List of Irish clans

Clann Néill (also Clan Neill)

Clan name (Tuath); Clann Néill (also Clan Neill)
Progenitor; Niall Caille
Hereditary Chief or Clan chief; Ó Néill Mór (O'Neill)
Septs (finte); Mac Lochlainn (McLaughlin), Mac Bearáin (Barron), Mac Seáin (McShane or Johnson), Mac Suibhne (MacSWEENEY, MacSWYN, SWAIN, SWINE), Ó Doibhlín (DEVLIN Swordbearer to O'Neill), Mac Giolla Easbaig (GILLESPIE, MacANASPIE, BISHOP), Mac Íomhair (MacIVER, MacKEEVER, MacURE, ORR), Mac Ladhmainn (MacCLEMENT, LAMOND, LYMON, MACLAMONT or CLEMENTS), Mac Conmidhe (MacNAMEE, MacCONAMY, MacMEADH, MEE), Mac Néill (Mac Niall), Mac Eoghain (MacKEAN, MacKEON).
Location - county, barony or townland; County Tyrone
Cinéal (Kinship); Cenél nEógain
Branches; Uí Néill Ruadh (Ó Néill Mór), Clann Áodh Búidhe.

Clann Domhnaill

Clan name (Tuath); Clann Domhnaill
Progenitor; Domnaill m. Muircherdaich m. Muiredaich m. Éogain m. Néill Noígiallaig
Hereditary Chief or Clan chief; Ó Donngaile (O'Donnelly)
Septs (finte); Ua [Fh]laithbheartaigh (Flaherty, Flaverty, Laverty, Lafferty)
Location - county, barony or townland; County Tyrone
Cinéal (Kinship); Cenél nEógain
Branches;

Muintír-Birn

Clan name (Tuath); Muintír-Birn
Progenitor; Birnn m. Ruadrach m. Murchada m. Máel Dúin m. Áeda Alláin
Hereditary Chief or Clan chief; Mac Ruaidhrí (MacRory, [Mac]Rogers)
Septs (finte); Mac Murchadha
Location - county, barony or townland; Strabane (upper)
Cinéal (Kinship); Cenél nEógain
Branches; Tellach Ainbhith

Cenél Fergusa

Clan name (Tuath); Cenél Fergusa
Progenitor; Fergusa m. Éogain m. Néill Noígiallaig
Hereditary Chief or Clan chief; Ua hÓgáin ('O'Hagan')
Septs (finte); O'Quinns, Ua Mael Fhabaill (Mulfoyle, et al.) and O'Mallons (O'Mellans)
Location - county, barony or townland; Dungannon (Upper)
Cinéal (Kinship); Cenél nEógain
Branches;

Cairrge Brachaidhe

Clan name (Tuath); Cairrge Brachaidhe
Progenitor; Brachaidi Mac Diarmada
Hereditary Chief or Clan chief; Ua Maol Fhábhaill (Mulfaal, Mulfavil, MacFael, Mulfoyle or Mac Paul)
Septs (finte); Carrichbrack (Carrickbraghy) in the barony of Inishowen West, County Donegal.
Location - county, barony or townland;
Cinéal (Kinship); Cenél nEógain
Branches;

Cenél mBinnigh

Clan name (Tuath); Cenél mBinnigh
Progenitor; Eochach Binnich m. Éogain m. Néill Noígiallaig
Hereditary Chief or Clan chief; Ua hAghmaill (O'Hamill), Teallach Duibhbrailbe
Septs (finte); Ua Brolaigh, herenaghs of Tech na Coimairce and Clongleigh
Location - county, barony or townland; Glenconkeine, barony of Loughinsholin
Cinéal (Kinship); Cenél nEógain
Branches; *Cenél mBinnig Glinne *Cenél mBindigh Locha Droichid (east of Magh Ith in Tirone) *Cenél mBindigh Tuaithe Rois (east of the Foyle) and one branch of the Ua Brolaigh

Cenél Moen

Clan name (Tuath); Cenél Moen
Progenitor; Maein m. Muireadaigh m. Éogain m. Néill Noígiallaig
Hereditary Chief or Clan chief; Ó Gairmleadhaigh (O'Gormley)
Septs (finte); O Duineachaidh, Ó Croidheáin (O Crean), Ó Lúinigh (O Lunny), O'Tierney (Ó Tiarnaigh), O'Kelly (Ó Ceallaigh), O'Cernaghan (Ó Cearnacháin), O'Garvey (Ó Gairbhith), MacDonaghy (Mac Donncha), Ó Peatáin (O'Patton or Peyton) and Ó Luinigh (or O'Loony)
Location - county, barony or townland; Magh Itha in the barony of Raphoe, County Donegal
Cinéal (Kinship); Cenél nEógain
Branches;

Cenél Fearadhaigh

Clan name (Tuath); Cenél Fearadhaigh
Progenitor; Feradaich m. Éogain m. Néill Noígiallaig
Hereditary Chief or Clan chief; Mac Cathmhaoil
Septs; McCaul, McIntyre, McGilbride, O'Bradley, McDonald, McAlister, McSorley, McGilpatrick, McGilchrist, McAleese, McFarland, McGivern, McConnell, McDaniel, McDonnell, McIver
Location - county, barony or townland; Clogher, County Tyrone
Cinéal (Kinship); Cenél nEógain
Branches; Mac Fiachra sept (MacKeaghery)

Cenél Tigernaich

Clan name (Tuath); Cenél Tigernaich
Progenitor; Tighearnach m. Muireadaigh m. Éogain m. Néill Noígiallaig
Hereditary Chief or Clan chief; Ó Maolfothartaigh (O'Mulfoharty), and Ó hEodhasa (O'Hosey)
Septs (finte);
Location - county, barony or townland; County Tyrone
Cinéal (Kinship); Cenél nEógain
Branches;

Clan Conchobhair

Clan name (Tuath); Clan Conchobhair
Progenitor; Conchobhar m. Fearghaile m. Maol Dúin m. Maol Fithrich m. Aodha Uairidnaigh
Hereditary Chief or Clan chief; Ó Cathain (O'Kane, Ó'Cahan)
Septs (finte); O'Maoláin (O'or McMullan), Mac Bloscaidh (MacCloskey)
Location - county, barony or townland; lords of Creeve (Coleraine area, County Londonderry) and Keenaght
Cinéal (Kinship); Cenél nEógain
Branches; Clan Drugain

Clan Drugain

Clan name (Tuath); Clan Drugain
Progenitor;
Hereditary Chief or Clan chief; Ó Cathain (O'Kane, Ó'Cahan)
Septs (finte); O'Maoláin (O'or McMullan), Mac Bloscaidh (MacCloskey), Mac Auslain (MacCAUSLAND, Scotland), Mac Aibhne (MacEVANY, MacAVENUE, MacAVINNEY, MacAVINNY, MacEVANNY), Mac Einrí (HENRY), Ó Maoilmheana (MULVANEY, MULVANE, MULVANY), Ó Maoilmhíchíl (Mulmeel), Ó Muireadhaigh (MURRAY, MORIE), Ó Cuaig (QUIGG FIVEY, KEGG, QUIG), Ó Cuinn (QUINN, QUIN, QWIN), Ó Tanaidhe (TANNY, TANNAY, TANNEY, TANNIE, TANEY), Mac Bháltair (MacWHIRTER, Scotland).
Location - county, barony or townland; lords of Creeve (Coleraine area, County Londonderry) and Keenaght
Cinéal (Kinship); Cenél nEógain
Branches;

Clan Diarmatta (also Clandermot)

Clan name (Tuath); Clan Diarmatta (also Clandermot)
Progenitor; Cearallán m. Baoighill m. Diarmada m. Conchobhair m. Fearghaile m. Maol Dúin m. Maol Fithrich m. Aodha Uaridnaich
Hereditary Chief or Clan chief; Ó Cairealláin, (O'Carolan)
Septs (finte); Mac Ettigan (Mac Eitigen)
Location - county, barony or townland; The parish of Clondermot in County Londonderry
Cinéal (Kinship); Cenél nEógain
Branches; Tealach Braonáin (Magettigan)

Cenél Aonghusa

Clan name (Tuath); Cenél Aonghusa
Progenitor; According to the O Clery Book of Genealogies, M. 790, lines 714 to 718; (Linea Antiqua, Royal Irish Academy MS 23D17, circa 1642), Eógan mac Niall's sons first conquered and held territory in the Bredach in Inishowen. They are enumerated in the following manner:

It e annso tellaighe na Bredchha

714. O Fheidlimid, cedus, muinter Ruarcan et muinter Treallan et muinter Slebhin et muinter Muirdelbaigh et clann Cumuscaigh et clann Narchon c: teallach Tuathail et clann Forcheirnn.

715. O Corbmac, uero, muinter Chele, ocus clann Minghoile, ocus clann Cerdan, ocus .h. Mail, et .h. Ultain et .h. Ruaigne.

716. O Dallan, .h. Eircinn, ocus .h. Cuiliun et .h. Reodan, .h. Ceallaigh, .h. Meran, ocus clann Cuan.

717. O Oilill, muinter Forceallaigh et muinter Mail raifthi, ocus .h. Rosaigh et .h. Gillagan, .h. Donnan, .h. Corpmaic, ocus sil meic Gluais, .h. Follamain, .h. Minain, .h. Uidir, .h. Fercumais,.h. Galan, .h. Donnugan uel .h. Branugan, .h. Ceallaigh, .h. Duibne et clann Filgaile.

718. O Oenghus, .h. Mail phoil, ocus .h. Brolaigh et cenel Oenghusa tulcha og (.i. mic Aini et mic Ecruiti). Et asd e an t-Aenghus sin do-choidh in echtra co righ Temra co nderna a muinerus fris, ocus cor fer comlann tar a chenn .i. cath mullaig Fedha et ba coimdith don chath, ocus d'Aenghus cor gair a cu .i. guan ar na cengal do chloich an atha co tainic ba guth an tigerna an cu .i. goan co ro-muigh an cath iertain co tucadh crich imdha, ocus erannus do, cor dhedhail da seacht macaib iertain; mac do, Echrach o tait clann Aenghusa eachrach i nn-ibh Uais breagh; mac ele do a crich fer Cul re Tulen atuaidh o ta clann Aenghusa cul et alii multi.

Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland; County Tyrone
Cinéal (Kinship); Cenél nEógain
Branches;

Cenél Mic Earca

Clan name (Tuath); Cenél Mic Earca
Progenitor; Máel Fithrich m. Áeda Uaridnaich m. Domnaill m. Muircherdaich mac Earca m. Muiredaich m. Éogain
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland; Barony of Clogher, County Tyrone
Cinéal (Kinship); Cenél nEógain
Branches;

Cenél Luighdech (also Sil Lugdach)

Clan name (Tuath); Cenél Luighdech (also Sil Lugdach)
Progenitor; Lugdach m. Sétnai mic Fergus m. Conaill Gulban m. Néill Noígiallaig
Hereditary Chief or Clan chief; Ó Domhnaill (O'Donnell)
Septs (finte); Uí Baoighill (O'Boyles) and the Uí Dochartaigh (O'Dohertys, chiefs of Arda Midhair or Ardmire, perhaps the Finn Valley) Ua Cairbre, Ó Duibhne (DEENY DEANY, DEENEY, DENNY, PEOPLES), Ó Daighre (DEERY, DARRY, DERRY), Mac Dailredochar (DOCKERY DOCKREY, DOCKRY), Ó Dunáin (DOONAN DONAYNE, DONNAN), Ó Dubhthach (Doohey), Ó Glacáin (Glacken), Mac Reannacháin (GRANAHAN, CRENAHAN, CRENAGHAN), Ó hEarghaile (HARLEY HARREL, HARRILY, HERAL), Ó hEigneacháin (HENEGAN HANAGHAN, HANNIGAN), Ó hOireachtaigh (HERAGHTY,ERACHTY, ERRARTY), Mac Meanman (MacMENAMIN, MacMENAM, MacMENAMY), Mac Maongail (MacMONAGLE, MONEYGAL), Ó Coigligh (QUIGLEY, QUIGLY, COGLEY, KEGLEY, TWIGLEY, QUIGG), Mac Robhartaigh (Roarty), Ó Robharcháin (ROWAN, RAGHAN, ROANE, ROHAN, ROUGHAN), Ó Scannail (SCANNELL, SCANLAN), Ó Toráin (TARRANT, TORAN, TORRENS), Mac Muircheartaigh (BREARTY, MacBREARTIE, MacMURTY), Mac Giolla Comhghaill (COYLE COWLE, MacILHOYLE, MULCOYLE), Ó Cromlaoich (CRUMLEY CROMLEY, CRUMLISH, CRUMMELL).
Location - county, barony or townland; Northern County Donegal
Cinéal (Kinship); Cenél Conaill
Branches; Clann Dálaigh (Ua Domhnaill), Clann Chindfaoladh (Ua Baoighill), Arda Midhair

Arda Midhair

Clan name (Tuath); Arda Midhair
Progenitor; Lugdach m. Sétnai mic Fergus m. Conaill Gulban m. Néill Noígiallaig
Hereditary Chief or Clan chief; Ó Dochartaigh (O'Doherty)
Septs (finte); Mac Giolla Brighdhe (MacBRIDE, GILBRIDE, KILBRIDE, MUCKLEBREED), Mac Eachmharcaigh (MacCAFFERTY MacCAFFERKY, MacCAVERTY), Mac Daibhí (MacDAVITT, MacDADE, MacDAID, MacDEVITT).
Location - county, barony or townland; Inishowen, Co. Donegal
Cinéal (Kinship); Cenél Conaill
Branches;

Cenél mBógaine

Clan name (Tuath); Cenél mBógaine
Progenitor; Énnae Bóguine m. Conaill Gulban m. Néill Noígiallaig
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland; Tír Boghaine (barony of Banagh, and part of the barony of Boylagh, in County Donegal).
Cinéal (Kinship); Cenél Conaill
Branches;

Cenél Aedha

Clan name (Tuath); Cenél Aedha
Progenitor; Aedha m. Ainmirech m. Setna m. Ferghusa cennfhoda m. Conaill Gulban m. Néill Noígiallaig
Hereditary Chief or Clan chief; Ó Maeldoraidh, Ó Canannáin (O'Cannon)
Septs (finte); Ó Gallchobhair (O'Gallagher)
Location - county, barony or townland; Barony of Tirhugh, alias Tír Aedha, in county Donegal
Cinéal (Kinship); Cenél Conaill
Branches;

Cenél Duach

Clan name (Tuath); Cenél Duach
Progenitor; Tigernach Duí (Duach), son of Conall Gulban.
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland;
Cinéal (Kinship); Cenél Conaill
Branches;

Clann Chindfaoladh

Clan name (Tuath); Clann Chindfaoladh
Progenitor; Baighill m Bradagain m Muirchertaigh m Cindfhaeladh
Hereditary Chief or Clan chief; Ua Bhaeighill (O'Boyle)
Septs (finte);
Location - county, barony or townland; Tir Ainmireach (around Ardara), Three Tuatha (around Falcarragh and Kilmacrennan) and barony of Boylagh in County Donegal.
Cinéal (Kinship); Cenél Conaill
Branches;

Muintir Dalachain

Clan name (Tuath); Muintir Dalachain
Progenitor; Baoighill m Bradagáin m Muirchertaigh m Cindfhaeladh
Hereditary Chief or Clan chief; Ó Cearnacháin (e.g. Kernaghan) and Ó Dalachain
Septs (finte);
Location - county, barony or townland; Tuath Bladhach (Bladhaigh)anglicized Tuath Doe (now Creeslough & Dunfanaghy), south of Ros-Iorguil (now Downing's & Carrigart) County Donegal
Cinéal (Kinship); Cenél Conaill
Branches;

Cenél Eanna

Clan name (Tuath); Cenél Eanna
Progenitor; Eanna (Enda), the sixth son of Conall Gulban
Hereditary Chief or Clan chief;
Septs (finte); Hanna,Hainey,Haney,Heaney (O'hEighnigh) (Ó hAnnaidh)
Location - county, barony or townland; Kings of Magh Ith, Tir Eanna and Fanad in present-day County Donegal.
Cinéal (Kinship); Cenél Conaill
Branches;

Cenél Endai

Clan name (Tuath); Cenél Endai
Progenitor; Enda, the youngest son of Niall of the Nine Hostages
Hereditary Chief or Clan chief; ua Lapáin (O'Lappin, Delap) and Aa h-Eicnechan (roughly O'Heneghan)
Septs (finte); Ua Bresleáin (O'Breslen or Breslin)
Location - county, barony or townland; the river Errity to Barnesmore, barony of Tir Hugh, to Sruell in the barony of Banagh, County Donegal. Parish of Aughnis, barony of Kilmacrenan.
Cinéal (Kinship); Uíbh Néill a' Tuaisceart
Branches; O'Breslin, chiefs in Fanad

Cenél Cairpri [Mor]

Clan name (Tuath); Cenél Cairpri [Mor]
Progenitor; Cairbre, son of Niall of the Nine Hostages
Hereditary Chief or Clan chief; Ó Maolchloiche (O'Mulclohy), a name which was later mistranslated to Stone
Septs (finte); Ua Bresleáin (O'Breslen or Breslin)
Location - county, barony or townland; "Críoch Cairpre Droma Cliab" of northern County Sligo and northeast County Leitrim. Barony of Carbury in North Sligo.
Cinéal (Kinship); Uíbh Néill a' Tuaisceart
Branches; O'Breslin, chiefs in Fanad, Uí Cairpri Laigen (Ua Chiardha or O'Keary, O'Carey), Cairpre Gabra (Ó Ronáin, O'Ronan)

Síl Aedha Eaniagh

Clan name (Tuath); Síl Aedha Eaniagh
Progenitor; Cairbre, son of Niall of the Nine Hostages
Hereditary Chief or Clan chief; O'Murchada, O'Murphy
Septs (finte); O'Mellon
Location - county, barony or townland; Barony of Strabane, County Tyrone.
Cinéal (Kinship); Uíbh Néill a' Tuaisceart
Branches;

Conmaicne

The Conmaicne of Magh Réin.

Conmaicne Cuile Toladh

Clan name (Tuath); Conmaicne Cuile Toladh
Progenitor; Findchóem (Traech mac Causcraid, or Fráech mac Cúscraigh) m. Cúmscrach (aka Cumascrach)
Hereditary Chief or Clan chief; Ó Talcharain (TOLLERAN, TALLERAN, TALRAN, TOLRAN)
Septs (finte); Ó Calarain (COLLERAN), Ó Morann (O'Moran), Ó Martain (Martin or Martins)
Location - county, barony or townland; Kilmaine barony, County Mayo.
Cinéal (Kinship); Conmaicne
Branches; Síl Cárida, Cenél Enda

Conmaicne Mara

Clan name (Tuath); Conmaicne Mara
Progenitor; Conmaic (a quo Conmaicne) m. Oirbsen Máir (a quo Loch n-Oirbsen)...ultimately Fergus mac Roich
Hereditary Chief or Clan chief; Úa Cadhla (O'Queally or O'Kealy)
Septs (finte); Mac Conghaile (Conneely, MacNeela), Ó Clochartaigh (Cloherty or Stone),Ó Dubháin (Devany), Mac Fualáin\Ó Cualáin (FOLAN, FOLAND, FOLANE).
Location - county, barony or townland; Connemara in western Co. Galway.
Cinéal (Kinship); Conmaicne
Branches;

Conmaicne Críchi Meic Eircce

Clan name (Tuath); Conmaicne Críchi Meic Eircce
Progenitor; Fraech, son of Cumscrach
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland; Kilconickny, Co. Galway
Cinéal (Kinship); Conmaicne
Branches; Cenél Lughna, Cenél cCais and Cenél Dubháin (Conmaicne Dúna Móir)

Conmaicne Mide la Cuirccne

Clan name (Tuath); Conmaicne Mide la Cuirccne
Progenitor; Copchass, in descent from Conmac, son of Orbsen mor.
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland; Quirene, a former name of the barony of Kilkenny West, Co. Westmeath.
Cinéal (Kinship); Conmaicne
Branches;

Conmaicne Bec

Clan name (Tuath); Conmaicne Bec
Progenitor; Conmaic (a quo Conmaicne) m. Oirbsen Máir (a quo Loch n-Oirbsen)...ultimately Fergus mac Roich
Hereditary Chief or Clan chief; Ua Tolairg (O'Toler)
Septs (finte);
Location - county, barony or townland; Quirene, Co. Westmeath
Cinéal (Kinship); Conmaicne
Branches;

Muintir Eolais

Clan name (Tuath); Muintir Eolais
Progenitor; Finer, son of Cúmscrach (aka Cumascrach)
Hereditary Chief or Clan chief; Mac Raghnaill, Mac Rannall (Reynolds or MacGrannell)
Septs (finte); Ó Mughroin (MORAN, MORAINE, MORANE, MOREN, MORRIN, MORYNE), Mac Searraigh (HERRY, SHARRY, FOALEY)
Location - county, barony or townland; Leitrim baronies of Mohill and Leitrim
Cinéal (Kinship); Conmaicne of Magh Réin
Branches; Tellach Brocáin (alias Tellach Cagáin), Tellach Cendetigh, Tellach Maelmartain, Tellach maelmuiri, Tellach n-Odrainn,

Tellach Cearbhallan

Clan name (Tuath); Tellach Cearbhallan
Progenitor; Finer, son of Cúmscrach (aka Cumascrach)
Hereditary Chief or Clan chief; Maoil Mhiadhaigh (Mulvey)
Septs (finte); Ó Beigléighinn (BEGLIN, BEGLAN, BEGLAIN, BEGNAL, BEGLANE, BIGLANE, BEGLEN, BEGLLIN, BIGLAN, BEGLYN ), Ó Bardain (BODEN ), Ó hEolusa (HALLISSY), Ó Muiredaigh (MURRAY, MORIE, MORRA, MORRIE, MOREY, ÓMORY, MURRY, MURRIE), Ó Cuirnin, ollamh (CURNIN, CURNAN, CURNEN), Ó Maolghuala (MULHOOLY, HOOGHLEY, MULHOOGHLEY, MULOOLEY), Mac Mioluic (MULLOCK MacMEELICK, MacMOLEG, MOOLICK, MULLICKE, MULOCK).
Location - county, barony or townland; Leitrim baronies of Mohill and Leitrim
Cinéal (Kinship); Muinter Eolais, Conmaicne of Magh Réin
Branches;

Cenel Luachain

Clan name (Tuath); Cenel Luachain
Progenitor; Luachan, son of Onchu, and 4th in descent from Cumscrach
Hereditary Chief or Clan chief; Mag Dorchaidh or Mac Dorchaidhe (Mac Dorcy, Darcy, Dorcey, MacGourkey)
Septs (finte); Ó Dunain (DOONAN DONAYNE, DONNAN, DOONANE, DOUNAN, DUNNAN, DYNAN), Ó Ciardubhain (KEARON, KERRANE, KERRIVANE, KERWAN, KIRRANE)
Location - county, barony or townland; Oughteragh parish, barony of Carrigallen, southern co. Leitrim
Cinéal (Kinship); Conmaicne of Magh Réin
Branches; Ui Bathbairr, Ui Braici, Ui Buibhin, Ui Chailti, Ui Cianacáin, Ui Conbhuidhe, Ui Damaigh of Cenél Luachain, Ui Dimusaigh, Ui Dubháin (Inis Doiri Dubháin), Ui Erailb, Ui Eturrain, Ui Gabhadáin, Ui Maelpátraig, Ui Maelsuthain, Ui Muinecháin, Ui Tredmain, Tellach Tanaide, Tellach Cléirigh.

Clann Calbrainn

Clan name (Tuath); Clann Calbrainn
Progenitor;
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland; Co. Leitrim
Cinéal (Kinship); Conmaicne of Magh Réin
Branches; Clann Martain, Clann Maelduilighe, Clann Bradain, Clann Arcain and Tellach Uanan

Clann Faelgusa

Clan name (Tuath); Clann Faelgusa
Progenitor;
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland; Co. Leitrim
Cinéal (Kinship); Conmaicne of Magh Réin
Branches; Clann Corrdercain, Clann Gemáin, Clann Cathusaigh, Clann Dinnachain, Clann Birn, Clann Anairc, Ui Conbhuidhe, Ui Gellustain, Ui Riaglachain.

Clann Finoicci, or Sil Findellaig

Clan name (Tuath); Clann Finoicci, or Sil Findellaig
Progenitor; Descendants of Finoicc, 2nd wife of Findellach, son of Neidhe, and 5th fr. Cumscrach
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland; Co. Leitrim
Cinéal (Kinship); Conmaicne of Magh Réin
Branches; Clann Telline, Clann Cronan, Clann Ainnsin, Clann Chirdubhain, Clann Finn, Clann Ciaracan, Clann Ibill

Cenél Cromáin

Clan name (Tuath); Cenél Cromáin
Progenitor;
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland; Co. Leitrim
Cinéal (Kinship); Conmaicne of Magh Réin
Branches;

Clann Faelchon

Clan name (Tuath); Clann Faelchon
Progenitor;
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland; Co. Leitrim
Cinéal (Kinship); Conmaicne of Magh Réin
Branches;

Tellach Finnachan

Clan name (Tuath); Tellach Finnachan
Progenitor;
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland; Co. Leitrim
Cinéal (Kinship); Conmaicne of Magh Réin
Branches;

Síl Maelefithrig

Clan name (Tuath); Síl Maelefithrig
Progenitor;
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland; Co. Leitrim
Cinéal (Kinship); Conmaicne of Magh Réin
Branches; Clann Clothachtaigh and Clann Oirechtaigh

Clann Fermaighe

Clan name (Tuath); Clann Fermaighe
Progenitor; Findellach, the son of Neidhe, and 5th in descent from Cumscrach
Hereditary Chief or Clan chief; Mac Cogadhain or Mac Acadhain (Mac Cogan)
Septs (finte);
Location - county, barony or townland; Glenfarne in the parish of Cloonclare in the baronies of Dromahaire and Rosclogher, Co. Leitrim.
Cinéal (Kinship); Conmaicne of Magh Réin
Branches; Clann Cellachain, Clann Maelsamhna, Clann Taebhachain, Clann Ubhan, Clann Lughann, and Clann Uanan

Muintir Geradháin

Clan name (Tuath); Muintir Geradháin
Progenitor;
Hereditary Chief or Clan chief; Mag Fhionnbhairr (Mac Ginver, Gaynor, or Finnevar)
Septs (finte);
Location - county, barony or townland; Lough Gowna in Co. Longford
Cinéal (Kinship); Conmaicne of Magh Réin
Branches; Tellach Finnoigi, Tellach Gabhadháin.

Muintír Giollagáin

Clan name (Tuath); Muintír Giollagáin
Progenitor; Race of Rudhraigh, that is, of the same stock as Mag Raghnaill of Muinter Eolais
Hereditary Chief or Clan chief; O Cuinn (O'Quin)
Septs (finte);
Location - county, barony or townland; Teathbha, baronies of Moydow and Shrule Co. Westmeath
Cinéal (Kinship); Conmaicne of Magh Réin
Branches; Tellach Connucan, Tellach Gormghaili, Tellach Maoilchíaráin

Muintir Anghaile

Clan name (Tuath); Muintir Anghaile
Progenitor;
Hereditary Chief or Clan chief; Ua Fearghaile (O'Farrell)
Septs (finte); Mac Gofraidh (MacSHAFFREY, GEOFFREY, JEFFRIES, SHEFFRY), Mac Concaille (MacCONCAILLE MacCONKEEL, MacENHILL, WOODS), Mac Conmhaic (CONNICK, CONNOCK, CONWICK), Mac Tadghan (KEEGAN KEAGHAN, KEAHAN, KEEHAN), Mac Cú Shléibhe (MacLEAVY MacALEAVY, MacCLEEVEY), Mac Murchadha (MacMORROW, MURROGH, MURROW, MORROGH), Mac Seáin (MacSHANE, JOHNSON), Ó Súilleabháin (SULLAHAN SOOLAHAN, SULLEHAN, SULLIHAN), Ó Tormaigh (TORMEY, TARMEY, TORMAY).
Location - county, barony or townland; Annually in county Longford
Cinéal (Kinship); Conmaicne of Magh Réin
Branches; Tellach Congaláin, Tellach Floinn

Síol Faolcháin

Clan name (Tuath); Síol Faolcháin
Progenitor; Éogan Cáech (Síl Mella,), son of Nath Í, and great-grandson of Éana Cionnsealach
Hereditary Chief or Clan chief; Mac Murchadha sept (MacMurrough, Kinsella), Kavanagh (Mac Murchadha Caomhánach or Ó Caomhánaigh). Current Chief is William Butler Kavanagh (Wales)
Septs (finte); Ua Finnthighearn (Finneran), Mac Bhadach (VADDOCK, MADDOCK, WADDICK, WADDOCK), Mac Dáibhí Mór (DAVIDSON, DAVIS, DAVYMORE, MacDavie More), Ó Dúnlaing (DOWLING, DOOLAN, DOOLEN, DOWLAN, DUNLANG; Síol Elaigh sept)
Location - county, barony or townland; South Wicklow & north-east Wexford
Cinéal (Kinship); Uí Chionnsealaigh
Branches; Gahan's of Síol Ealaigh (barony of Shillelagh)

Siol aElaigh

Clan name (Tuath); Siol aElaigh
Progenitor;
Hereditary Chief or Clan chief; Ó Gaotháin (GAHAN)
Septs (finte); Ó Niall, Ó Dúnlaing
Location - county, barony or townland; South Wicklow & north-east Wexford
Cinéal (Kinship); Síol Faolcháin, Uí Chionnsealaigh
Branches;

Uí Felmeda Thes

Clan name (Tuath); Uí Felmeda Thes
Progenitor;
Hereditary Chief or Clan chief; Úa Murchadha (O'Murroughe, Murrowes or Murphy) chiefs of Crioch O'Felme or Hy-Feidhlme [Hy-Felimy]
Septs (finte); Ó Gairbhain (GARVAN, GIRVAN)
Location - county, barony or townland; Offelimy, now the barony of Ballaghkeen, in County Wexford. Oulartleigh Castle
Cinéal (Kinship); Uí Ceinnselaig
Branches;

Uí Felmeda Tuaidh

Clan name (Tuath); Uí Felmeda Tuaidh
Progenitor; Oilioll mac Muiredaig, alias Ui Onchon
Hereditary Chief or Clan chief; O'Garvey
Septs (finte);
Location - county, barony or townland; Tulach Ua Felmedha, aka Tullowphelim, became the namesake for the parish of Tullow. Rathvilly, Co. Carlow
Cinéal (Kinship); Uí Ceinnselaig
Branches;

Sil Chormaic (Clann Cormaic )

Clan name (Tuath); Sil Chormaic (Clann Cormaic )
Progenitor; Cormaicc m. Nath Í m. Crimthaind m. Énnai Ceinselaig
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland; River Slaney basin in County Wexford, the MacMurrough royal demesne around Ferns, as well as the barony of Scarawalsh
Cinéal (Kinship); Uí Ceinnselaig
Branches; Cuthraighe, Ua Trena, Ui Cruinn or Ui Cuinn, Ua Gabla Fine and Ua Gabla Roireann

Sil Máeluidir

Clan name (Tuath); Sil Máeluidir
Progenitor;
Hereditary Chief or Clan chief; Ua hArtghaile (Hartley)
Septs (finte); Ó Foirtcheirn (FORTUNE, FORTIN), Ó Laidhgnen (LYNAN,LYNAGH'LEEGYAN'), (both Ui Deagha), Ó Cuilen (Cullen)
Location - county, barony or townland; The Baronies of Shelmalier in county Wexford
Cinéal (Kinship); Uí Ceinnselaig
Branches; Ui Deagha, Ferann na Cenél

Uí Fergusa

Clan name (Tuath); Uí Fergusa
Progenitor;
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland;
Cinéal (Kinship); Uí Ceinnselaig
Branches;

Clann Guaire

Clan name (Tuath); Clann Guaire
Progenitor;
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland;
Cinéal (Kinship); Uí Ceinnselaig
Branches;

Clann Fiachu meic Ailella

Clan name (Tuath); Clann Fiachu meic Ailella
Progenitor;
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland;
Cinéal (Kinship); Uí Ceinnselaig
Branches;

Uí Muiredaig

Clan name (Tuath); Uí Muiredaig
Progenitor; Descend from Ughaire, a King of Leinster (died 956), Muiredaig m. Murchada m. Bráen (d. 693)
Hereditary Chief or Clan chief; Ua Tuathail (O'Toole)
Septs (finte); Ua Lorcáin
Location - county, barony or townland; The baronies of Kilkea and Moone, Narragh and Reban East and West, and parts of Connell, in co. Kildare, plus the plus west half of Uí Mail, in co. Wicklow.
Cinéal (Kinship); Uí Dúnlainge
Branches;

Uí Dúnchada

Clan name (Tuath); Uí Dúnchada
Progenitor; Gillai Mo Cholmóc m. Cellaich m. Dúnchada m. Lorccáin m. Fáeláin m. Muiredaig m. Bróen m. Fáeláin m. Cellaich m. Dúnchada m. Murchada.
Hereditary Chief or Clan chief; Mac Gilla Mo-Cholmóg (FitzDermot or COLEMAN)
Septs (finte); Ó Duibhghin (Dugan), Ó Tadhgain (TEAGAN, TEEGAN).
Location - county, barony or townland; The land between the river Liffey and the 'Dublin' mountains.
Cinéal (Kinship); Uí Dúnlainge
Branches;

Uí Fáeláin

Clan name (Tuath); Uí Fáeláin
Progenitor; Fáeláin m. Murchada m. Find m. Máel Mórda m. Muirecain m. Diarmata m. Rhuadri m. Fáeláin m. Murchada m. Bráen
Hereditary Chief or Clan chief; Ó Broin (O'Byrne)
Septs (finte); MacEochaidh (MacKeogh)
Location - county, barony or townland; Crioch Bhranach, and included the barony of Newcastle with parts of the baronies of Ballinacor and Arklow.
Cinéal (Kinship); Uí Dúnlainge
Branches;

Uí Fergusa

Clan name (Tuath); Uí Fergusa
Progenitor; Fergus son of Dúnlang, son of Enna Nia, son of Bressal Bélach, son of Fiachu Baicced, son of Cathir Mor.
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland; Their traditional territory immediately west of Dublin prior to the arrival of the Vikings, other sources give their territory between the river Liffey and Fir Cualand.
Cinéal (Kinship); Uí Dúnlainge
Branches;

Uí Briúin Cualand

Clan name (Tuath); Uí Briúin Cualand
Progenitor; Brian, son of Enna Nia, son of Bressal Bélach, son of Fiachu Baicced, son of Cathir Mor
Hereditary Chief or Clan chief; Ó Coscrach (Cosgrave, or Cosgrove)
Septs (finte);
Location - county, barony or townland; Baronies of Ballinacor North and Rathdown, in co. Wick., and the south half of the barony of Rathdown, in co. Dublin.
Cinéal (Kinship); Dál Niad Cuirp
Branches;

Uí Máeli Tuile

Clan name (Tuath); Uí Máeli Tuile
Progenitor; Fiachu Ba h-Aiccid, a son of Cathaír Már
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland;
Cinéal (Kinship); Dál Niad Cuirp
Branches;

Uí Bairrche

Clan name (Tuath); Uí Bairrche
Progenitor; Dáire Barraig m. Cathaír Máir
Hereditary Chief or Clan chief; Mac Gormain (GORMAN)
Septs (finte); Mic Raith (MacGRATH), Ó Tresaigh (TRACY, TRASSY, TRACIE), Ó Duibhin (Duffin)
Location - county, barony or townland; Lord of Bargy at Slievemargy, Laois
Cinéal (Kinship); Dál Niad Cuirp
Branches; Uí Bairrch Maige hAilbe (Carlow), Uí Bairrche of Mag Argetrois, Uí Bairrche Maige Indergraith (Uí Chritain) & Uí Bairrche Tíre (Uí Dimmatain), Uí Bairrche Magh dá chonn

Uí Bairrch Maige hAilbe

Clan name (Tuath); Uí Bairrch Maige hAilbe
Progenitor; Mostly from Eochu Guinech ...Dáire Barraig m. Cathaír Máir
Hereditary Chief or Clan chief;
Septs (finte); Úi Briccne, Úi Cellaig, Úi Scatháin, Úi Cutlacháin, Úi Máeláin ("Mullen, Moylan, McMullen"), Úi Dobágu, Úi Fólachtáin, Úi Chommáin (Comane), Úi Gobbáin (Gowan), Úi Nárbotha, Síl Saichtha, Úi Canáin (Cannon?), Úi Conamla, Úi Crítáin, Úi Drescáin (or Úi Treascáin),Úi Émíne, Úi Pecclíne (Pelan ?), Úi Taidc (Teige), Úi Bóeth (see Úi Meic Barddíne), Úi Brandubáin (Braniff), Úi Brénaind (Brennan?), Úi Briúin ("Breen, Brown, Burns")
Location - county, barony or townland; Baronies of Slievemargy in Co. Laois, parts of Idrone in Co. Carlow, and Kilkee and Moone in Co. Kildare)
Cinéal (Kinship); Dál Niad Cuirp
Branches; Úi Cellaig (Or Úi Ellaig)

Uí Bairrche Mag Argetrois

Clan name (Tuath); Uí Bairrche Mag Argetrois
Progenitor; Dáire Barraig m. Cathaír Máir
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland; The ancient name of Ballyragget in Kilkenny was Dún Tulach Uí mBairrche (Tullabarry/Tulacbarry)
Cinéal (Kinship); Dál Niad Cuirp
Branches; Clann Síláin (amongst the Osraighe)

Uí Bairrche Magh dá chonn

Clan name (Tuath); Uí Bairrche Magh dá chonn
Progenitor; Dáire Barraig m. Cathaír Máir
Hereditary Chief or Clan chief; Úi Fétháin
Septs (finte); Ui Cearnaigh i Muigh Dha Chonn (O’Carny, O’Kearney)
Location - county, barony or townland; Moyacom of East Carlow
Cinéal (Kinship); Dál Niad Cuirp
Branches;

Uí Bairrche Maige Dergráith

Clan name (Tuath); Uí Bairrche Maige Dergráith
Progenitor; Dáire Barraig m. Cathaír Máir
Hereditary Chief or Clan chief;
Septs (finte); Úi Amsáin, Úi Crítáin, Úi Bodbáin, Úi Brócáin (O’Brogan), Úi Buidechair
Location - county, barony or townland;
Cinéal (Kinship); Dál Niad Cuirp
Branches; Síl Cillíne Scothbán

Uí Bairrche Tíre

Clan name (Tuath); Uí Bairrche Tíre
Progenitor; Mostly from Féicc....Dáire Barraig m. Cathaír Máir
Hereditary Chief or Clan chief; Uí Treasaigh
Septs (finte); Úi Dímatáin, Úi Mincháin, Síl Rossa mc Muiredaig, Úi Senáin, Úi Móenaig (Mooney), Úi Rónáin (Ronane or Royane), Úi Cuilíne (Cullen) dia fail Diarmait Glinni Uissen, Síol Cumaine (Cummin), Úi Cutlacháin dia fail Diarmait Glinni Uissen, Úi Dobágu, Úi Móenacháin (Mangan), Ui Nialláin (Nealon)
Location - county, barony or townland; The barony of Bargy
Cinéal (Kinship); Dál Niad Cuirp
Branches;

Uí Crimthainn Áin

Clan name (Tuath); Uí Crimthainn Áin
Progenitor; Crimthaind Áin m. Cathaír Máir
Hereditary Chief or Clan chief; O'Duff
Septs (finte);
Location - county, barony or townland; Dún Masc (the rock of Dunamase)
Cinéal (Kinship); Dál Niad Cuirp
Branches;

Uí Failge

Clan name (Tuath); Uí Failge
Progenitor; Donnchad mc Con Faifne m. Murchertaig m. Congalaig m. Duind Slébi m. Brógarbáin m. Conchobuir m. Find m. Máel Mórdae m. Conchobuir m. Flannacáin m. Cináeda m. Mugróin m. Óengussa m. Flaind m. Díumasaig m. Forannáin m. Congalaig m. Máel h-Umae m. Cathail m. Éogain Bruidne m. Nath Í m. Rossa Failgi m. Cathaír Máir.
Hereditary Chief or Clan chief; Ua Conchobair Failghe (O'Connor Faly)
Septs (finte); O Caomhanaigh, O Tuathalaigh, O Branaigh, Mac Giolla Phadraig, O Duinn, O Diomasaigh, O Duibhidhir, muinntear Riain, Mac an Chrosain (MacCROSSAN), Ó hEimhin (HEAVEN EVANS, EVINS, HEAVAN), Ó hUidhrin (HEERIN, HEERAN, HEERANE, HEFFRON, HERANE, HEVERIN, HYRANE), Ó Reachtabra (RAFTER RAFFTER, RAFTERY, RAFTIS, RAGHTORE, WRAFTER), Ó Seabhlain (HEVLIN, SHOVELIN, TEVLIN), Mac Spealáin (SPILLANE, SMOLLEN, SPALANE, SPELLAN, SPELMAN), Ó hAimhergin (ERGIN, BERRIGAN, BERGAN, HAMERGIN), Ó Breacain (BRACKEN), Ó Conarain (CONDRON, CONDRAN, CONDRIN, CONERAN, CONORAN), MacConnla (CONLEY CONLY, CONNLA),
Location - county, barony or townland; The territory of Ui Failghe or Ophaley comprised the following Baronies: Geshill in the King's Co.; Upper Philipstown and Lower Philipstown in the King's Co.; Warrenstown and Collestown in the same County; Ophaley or Offaley in the Co. of Kildare; Portnahinch and Tinahinch in the Queen's County.
Cinéal (Kinship); Dál Niad Cuirp
Branches; Uí Riagáin (O'Regan and O'Dunne), and the Clann Máellugra (O'Dempsey), Maigh Aoife, Uí Mealla, Clann Mugróin, Uí Bercháin, Uí Nialláin, Uí Berraide, Cenel Aitheamháin, Uí Flaind, Uí Chormaic, Uí Móenaig, Uí Berraidi, Uí Airmedaig, Uí Máele Topair, Uí Chuilíne, Uí Máel Aithgén, Uí Maine, Uí Onchon

Uí Riagáin

Clan name (Tuath); Uí Riagáin
Progenitor; Cerball & Mac Tíre dá m. Con Bladma m. Con Allaid m. Fidallaid m. Duinn m. Duibgilla m. Máel Finne m. Riagáin m. Cináeda m. Mugróin m. Flaind.
Hereditary Chief or Clan chief; Ó Riagain (O'Regan and O'Dunne)
Septs (finte);
Location - county, barony or townland; The barony of Tinnahich, the most northern barony of Co Leix (Laois)
Cinéal (Kinship); Uí Fáilghe
Branches;

Clann Máellugra aka Cenél Maoilughra, Clanmalier

Clan name (Tuath); Clann Máellugra aka Cenél Maoilughra, Clanmalier
Progenitor; Flann m. Máel Ruanaid m. Cellaich m. Máel Augra m. Conchobuir m. Áeda m. Tomaltaich m. Flaind m. Díumasaich m. Congaile m. Forannáin m. Congaile m. Máel h-Umai m. Cathail m. Bruidge m. Nath Í m. Rosa Failgi.
Hereditary Chief or Clan chief; Ua Díomasaigh (Dempsey)
Septs (finte); Ó Bearghda (BARRY, BEARY), Ó Maoil Eimhin (MULLAVIN MALLAVIN, MacLAVIN, MULLEVANE, MULLEVEN, MULLIVANE, Ó Coinin (CONINE, CUNEEN, KINANE, KINNEEN)
Location - county, barony or townland; Barony of Upper Philipstown in the King's County and the Barony of Portnahinch in the Queen's County.
Cinéal (Kinship); Uí Failge
Branches;

Clann Colgcan (Clann Cholgaín)

Clan name (Tuath); Clann Colgcan (Clann Cholgaín)
Progenitor; Domnall Úa Óengusa m. Áeda m. Uallacháin m. Taidgc m. Uallacháin m. Taidgc m. Domnaill m. Óengusa m. Cummascaig m. Colgcan m. Mugróin m. Flaind Dá Chongal m. Díumasaich m. Forannáin m. Congaile m. Máel h-Umai m. Cathail [m. Éogain] m. Bruidge m. Nath Í m. Rosa Failgi m. Cathaír Máir.
Hereditary Chief or Clan chief; Ua hAonghusa (O'Hennessy)
Septs (finte); Ua hUallachain (O'Holohan or O'Houlihan), Uí Rotaidi, Uí Muricáin, Uí Bróen, Uí Cholgan, Ó Mael Eidigh (MULEADY, MALADY, MALLEW, MELODY, MILEY, MILLEA), Ó Maolagain (MULLIGAN, MILLICAN, MILLIKAN, MILLIKEN), Mac Cochlainn (COLGAN)
Location - county, barony or townland; Barony of Lower Philipstown, Co. Offaly
Cinéal (Kinship); Uí Failge
Branches; O'Hennessy of Gailenga Bec, and of Uí Mac Uais

Ui Mealla

Clan name (Tuath); Ui Mealla
Progenitor; Rosa Failgi m. Cathaír Máir.
Hereditary Chief or Clan chief; Ó Finnthighearn (FINNERAN, FANARAN)
Septs (finte);
Location - county, barony or townland; Uisneach, now in Galway and Roscommon
Cinéal (Kinship); Uí Failge
Branches;

Maigh Aoife

Clan name (Tuath); Maigh Aoife
Progenitor; Rosa Failgi m. Cathaír Máir.
Hereditary Chief or Clan chief;
Septs (finte); Ó Moenaigh (MOONEY, MAINEY, MEONA, MOONY), Ó Mughron (MORAN, MORAINE, MORANE, MOREN, MORRIN, MORYNE, MOURANE, MURRAN), Ó Muireagain (MORGAN MORRIGAN, MURCAN, MURGAN, MERRIGAN)
Location - county, barony or townland; Parsons of Ballymooney, Geasehill, Offaly
Cinéal (Kinship); Uí Failge
Branches;

Uí Enechglaiss

Clan name (Tuath); Uí Enechglaiss
Progenitor; Dúnlang m. Fiachrach m. Fínnsnechtae m. Cináeda m. Cathail m. Fiachrach m. Dúnchada m. Dúnlaing m. Dúngalaig m. Thuamín m. Máel Doborchon m. Dícolla m. Éogain [m. Beraig] m. Muiredaig m. Amalgada m. Nath Í m. Bressail Enechglais (a quo Uí Enechglais) m. Cathaír Máir.
Hereditary Chief or Clan chief; Ua Fiachrach (O'Feary, FEERY, FEIGHRY, FEHERY, FEEREY, HUNT)
Septs (finte);
Location - county, barony or townland; South of Arklow in County Wicklow
Cinéal (Kinship); Dál Niad Cuirp
Branches; Uí Inmiti, Uí Aithemon Mestige, Cenél Lugair Fatha h-uir dia tát Uí Cruchtáin, Síl Fuamnaige .i. Uí Toísecháin ó Druim Laígill; Síl Duib Damruis Uí Gobbáin & Uí Muirbetaig & Uí Dimbrogo Nuadat

Uí Drona

Clan name (Tuath); Uí Drona
Progenitor; Labraid Laidech, son of Bressal Bélach, son of Fiachu Baicced, son of Cathair Mór
Hereditary Chief or Clan chief; Ó Riain (RYAN, ROYNE, RYNE, RYANE)
Septs (finte); Ó Domhnaill (DONNELL, DANIEL, DANIELS), Ó Dubhgilla (DOYLE DOWALL, DOWILLA, DOYAL), Ó hEideain (HAYDEN HAYDAN, HAYDON, HEADON, HEDANE, HEDIAN, HEYDON)
Location - county, barony or townland; Baronies of Idrone East and West in county Carlow
Cinéal (Kinship); Dál Niad Cuirp
Branches; Ui Drona Laighin

Uí Cheithig aka Uí Ceataigh

Clan name (Tuath); Uí Cheithig aka Uí Ceataigh
Progenitor; Cathair Mór's son Ailill Cétach (Céthech)
Hereditary Chief or Clan chief; Ó Ceatfadha (KEATY, KEATHY)
Septs (finte);
Location - county, barony or townland; Baronies of Ikeathy and Oughterany in northern Co. Kildare (Cenel n-Ucha and Uachtar Fine,respectively). Crích na Cétach: baronies of Warrenstown, co. Offaly and neighboring Upper Moyfenrath, co. Meath.
Cinéal (Kinship); Dál Niad Cuirp
Branches; Cenél Ucha comprised the Uí Fithcellaigh, Uí Maili Derir, Uí Bóetain, Uí Broscai and Uí Folaing., Uí Mainchin of Tír Cenél nUcha, Ui Faebrannáin Uachtair Fine (of Ui Fine), Cilline mór, son of Coirpre, ancestor of the Ua Meimre and the Ui Foebraind of Uachtar Fine

Cinel Uchae

Clan name (Tuath); Cinel Uchae
Progenitor;
Hereditary Chief or Clan chief;
Septs (finte); Ó Coscrach (COSGRAVE, COSGROVE, COSKRY, CUSKER,), Ó Beaghain (BEHAN, BEAGHAN, BEAN, BEEGAN, BEGGANE, BEHANE, BIGANE, BIGGANE,BIGGINS, LITTLE), Ó Cobthach (COFFEY COFFEE, COFFIE, COFFY, COWEY, COWHEY, COWHIG), Mac Fhogartach (GOGARTY, GOGERTY, GOGGARTY)
Location - county, barony or townland; Baronies of Ikeathy and Oughterany in northern Co. Kildare (Cenel n-Ucha and Uachtar Fine,respectively). Crích na Cétach: baronies of Warrenstown, co. Offaly and neighboring Upper Moyfenrath, co. Meath.
Cinéal (Kinship); Dál Niad Cuirp
Branches; Uí Fithcellaigh, Uí Maili Derir, Uí Bóetain, Uí Broscai and Uí Folaing., Uí Mainchin of Tír Cenél nUcha (Clann Manchine at the Liffey)

Uí Dergmosaich h-ic Áth Chliath

Clan name (Tuath); Uí Dergmosaich h-ic Áth Chliath
Progenitor; Dergmosach m. Cathaír Már
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland; Áth Chliath
Cinéal (Kinship); Dál Niad Cuirp
Branches;

Uí Luascán

Clan name (Tuath); Uí Luascán
Progenitor; Fergus Luascán m. Cathaír Már
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland;
Cinéal (Kinship); Dál Niad Cuirp
Branches;

Uí Timmíne

Clan name (Tuath); Uí Timmíne
Progenitor; Eochu Timmíne m. Cathaír Már
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland;
Cinéal (Kinship); Dál Niad Cuirp
Branches; Uí Báetáin, Uí Buide

Uí Máil

Clan name (Tuath); Uí Máil
Progenitor; Maine Máil m. Feidelmid Fir Aurglais m. Corbmaic Gelta Gáeth m. Niad Cuirb (Nia Corb) m. Con Corb (Cu Chorb)
Hereditary Chief or Clan chief; Uí Ceallaig Cuallan (O'Kelly of the Dublin/Wicklow hills)
Septs (finte); Uí Theig or Ó Taidhg (O'Tighe),
Location - county, barony or townland; The Glen of Imaal, Co. Wicklow
Cinéal (Kinship); Dál Niad Cuirp
Branches;

Uí Deaghaidh

Clan name (Tuath); Uí Deaghaidh
Progenitor; Labraid Laidech, son of Bressal Bélach, son of Fiachu Baicced, son of Cathair Mór
Hereditary Chief or Clan chief; Ó hAedha (Ó Hea,O'Hay or Hughes)
Septs (finte);
Location - county, barony or townland; Limerick Hill (Luimnech) in north County Wexford, barony of Gorey
Cinéal (Kinship); Dál Niad Cuirp
Branches; Uí Dega Tamhnaige (of Dál Birn) of north Ossory and the Uí Dega Bic (desc. from Daig Bec m. Labrada) of Offaly

Dál Cormaic Luisc

Clan name (Tuath); Dál Cormaic Luisc
Progenitor; Corbmaic m. Con Corb (clan of Cormac Losc)
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland; Located in the southernmost barony of County Kildare, that is the barony of Kilkea and Moone.
Cinéal (Kinship); Laighin
Branches; Uí Labrada, Uí Gabla Fini, Uí Gabla Roírenn, Uí Buide, Uí Dega Bic .i. Uí Muiredaig, Uí Chuilind, Uí Labrada Cuthraige .i. Síl Fergusa Cuthig, Uí Chuircc, Uí Librén, Uí Ochrai.

Uí Buide

Clan name (Tuath); Uí Buide
Progenitor; Echthigern m. Donngusa m. Mencossaig m. Máelgairb m. h-Uargusa m. Buide (a quo Uí Buide) m. Laidcnén m. Cuimmíne m. Colmáin Elténe m. Blaithmeic m. Áeda Indén m. Cathbad m. Labrada m. Imchada m. Cormaic m. Con Corb.
Hereditary Chief or Clan chief; Ó Caollaidhe (Queally, O'Kealy or O'Kelly)
Septs (finte);
Location - county, barony or townland; Barony of Ballyadams, County Leix. East Kilkenny; and at Ballykealey, Carlow.
Cinéal (Kinship); Dál Cormaic Luisc
Branches;

Uí Labrada

Clan name (Tuath); Uí Labrada
Progenitor; Sinchell m. Cenannáin m. Macha mc Cruaich m. Dulge m. Imchada m. Brolaich m. Lugdach m. Labrada m. Imchada m. Corbmaic m. Con Corb
Hereditary Chief or Clan chief;
Septs (finte); Cuthraighe (Ui Cormaic Laighen)
Location - county, barony or townland;
Cinéal (Kinship); Dál Cormaic Luisc
Branches; Uí Labrada Cuthraige .i. Síl Fergusa Cuthig, Uí Chuircc, Uí Librén, Uí Ochrai

Uí Gabla

Clan name (Tuath); Uí Gabla
Progenitor; Sinchell m. Cenannáin m. Macha mc Cruaich m. Dulge m. Imchada m. Brolaich m. Lugdach m. Labrada m. Imchada m. Corbmaic m. Con Corb
Hereditary Chief or Clan chief;
Septs (finte); Cuthraighe? (Ui Cormaic Laighen)
Location - county, barony or townland; Barony of North Salt in northern County Kildare & Roíriu (now Mullaghreelion) a few miles south of Athy in south Kildare, respectively
Cinéal (Kinship); Dál Cormaic Luisc
Branches; Uí Gabla Fine & Uí Gabla Roírenn

Dál Messin Corb (Ui Meisincorp)

Clan name (Tuath); Dál Messin Corb (Ui Meisincorp)
Progenitor; Mesin Corb mc Con Corbb
Hereditary Chief or Clan chief; Ua Feghaile (O'Farrelly, Uí Garrchon)
Septs (finte);
Location - county, barony or townland; Wicklow mountains, to north of Arklow in county Wicklow. Originally, Liffey plain.
Cinéal (Kinship); Dál Messin Corb
Branches; Uí Garrchon, Uí Con Corbb, Uí Con Cainnig, Uí Chúáin, Uí Alténi, Uí Doccomláin, Uí Bróccáin, Uí Garbáin, Uí Chon Galand, Uí Bróccéni, Cenél Ciaráin & Uí Techtaire, Uí Meic Aird Maigne & Uí Moínaig & Uí Conndoith & Uí Feichíne & Uí Cáechtangéni, Uí Noíthig & Uí Follomuin & Uí Forandlo, Uí Dímmae Cirr & Uí Congnaid, Uí Dubchróin & Uí Beraich, Uí Donnáin & Uí Sáráin

Uí Garrchon

Clan name (Tuath); Uí Garrchon
Progenitor; Domnall m. Fergaile m. Flaithnia m. Máel Kalland m. Gormáin m. Fáebuirdatha m. Dúngaili m. Cethernaig m. Fáeburdatha m. Dúngaile m. Cethernaig m. Fáebuirdatha m. Marcáin m. Cillíne m. Rónáin m. Sinill m. Conaill m. Con Chongalt m. Finnchada m. Garrchon m. Fothaid m. n-Echach Lámdeirg m. Mesin Corb mc Con Corbb.
Hereditary Chief or Clan chief; Ua Feghaile (O'Farrelly)
Septs (finte); Ó Corra (CORR, CARRY, CARR), Ó Guaire (GORRY, GORY, GORE, GORRIE), Ó Lionnain (LENNON, LANNING, LEENAN, LENAN, LENANE, LENNANE),
Location - county, barony or townland; Kings of Fortuath Laigin at Bray, Wicklow.
Cinéal (Kinship); Dál Messin Corb (Ui Meisincorp)
Branches; Ui Saráin (Chimbeada), Ui Brain Deilgine, Ui Cholmain Fordobuil

Dal Cairbre Aradh (Dál Coirpri Aradh) Cliach

Clan name (Tuath); Dal Cairbre Aradh (Dál Coirpri Aradh) Cliach
Progenitor; Mál mac Arbhara...Flaithbertach m. Crunnmaíl m. Commáin m. Fínáin m. Fhaigir m. Eirníne m. Féicc m. Meic Ieir m. Gossa m. Fabrich m. Máil m. Ainmerech m. Fir Roith m. Muine m. Fir Neud m. Fir Lugdach m. Buain m. Argatibair m. Cairpre Cluichechair mc Con Corb & Eithne Sithbaicce ingen side Óengusa Múisc
Hereditary Chief or Clan chief;
Septs (finte); Ó hIarlaith (HERLIHY, HARLEY, HURLEY), Ó Geibhennach (GIVNEY, COVENEY, GEANY, GEVENEY, GIBNEY, GUINAN, GUINEA, KEVENEY), Ó Cathalain (, Ó Cadhla (KEILY, KEALY, KEELY, KIELY), Ó Longaidh (LONG, LONGY), Mac Muirnigh (MURNEY, MORNIE, MORNEY), Mac Bearthagra (BERKERY BARAGRY, BARGARY, BARRAGRY, BERACHRY, BERKERRY)
Location - county, barony or townland; Ara Chliach was centered east of the city of Limerick, perhaps in or near the baronies of Clanwilliam and Coonagh in northeastern county Limerick.
Cinéal (Kinship); Dál Cairpre Cluichechair
Branches; Uaithne Cliach, Uí Cuanaigh (MacMuirnigh, Ó Longaidh)

Dal Cairbre Aradh Tíre

Clan name (Tuath); Dal Cairbre Aradh Tíre
Progenitor; Finnchaidh, son of Ferroith...Connaid m. Máeli Doburchon m. Lóchéne m. Demle m. Lommáin m. Cuirc m. Findchada m. h-Írchada m. Fir Roith m. Fir Nuad m. Buain m. Airgetbrain m. Cairpri Cluichechair m. Con Corb unum genus est & Dál Cairpri Arad Tíre.
Hereditary Chief or Clan chief; Ó Riada (REIDY, REEDY, REDDY, READY -W. Tipp.), Ó Donnagain (DONEGAN, DONNEGAN, DONNEGANE, DOONICAN, DOONIGAN, DUNICAN, DUNNIGAN)
Septs (finte); Ó Murnain (MURNANE, MARRINANE, MARNANE, WARREN-W. Tipp.), Ó hAinmhireach (HANBERRY, HANNEBERRY, HANBURY, HAMERY, ANSBORO-W. Tipp.), Ó Bodhran (BURRANE, BORAN -W.Tipp), Ó Danchair (DANAHER, DANAGHER), Ó Dubh Dabharc (DURACK, DOORICK -W.Tipp Uaithne Tíre), Ó Loingsigh (LYNCH LYNCHY, LENCH,LENCHY)
Location - county, barony or townland; Co. Tipperary (Aradh Tíre was located in northern Tipperary, within the half barony of Ara (and Owney) or the northern half of the barony of Owney and Ara.)
Cinéal (Kinship); Dál Cairpre Cluichechair
Branches; Uaithne Tíre

Dál Coirpri Cliach (Dál Coirpri Loingsic Beic)

Clan name (Tuath); Dál Coirpri Cliach (Dál Coirpri Loingsic Beic)
Progenitor; Lughaidh Corb from,..Cairpre Cluichechair mc Con Corb & Eithne Sithbaicce ingen side Óengusa Múisc
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland; Barony of Idrone in Co. Carlow (in Leinster).
Cinéal (Kinship); Dál Cairpre Cluichechair
Branches; Dál Coirpri Loingsic

Dál Coirpri Loingsic

Clan name (Tuath); Dál Coirpri Loingsic
Progenitor; Coirpri Musc the poet, who received the land of Tír nAmhais from Aongus Musc. ...Lughaidh Corb from,..Cairpre Cluichechair mc Con Corb & Eithne Sithbaicce ingen side Óengusa Múisc
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland; Munster
Cinéal (Kinship); Dál Coirpri in Ara Cliach (Dál Coirpri Loingsic Beic)
Branches;

Uí nEirc (Ui Maic Eirce)

Clan name (Tuath); Uí nEirc (Ui Maic Eirce)
Progenitor; Tuthal son of Muirithe, son of Maoltuile, son of Cuan, son of Conall, son of Grilline, son of Maoltuile son of Cuan, son of Conall, son of Grilline, son of Mac Eirc (a quo Ui Maic Eirce), son of Ailill Cennfada, son of Erc, son of Cairbre eabha, son of Brian, son of Fiacha Fidhgheinte (a quo Ui Fidhgeinte)
Hereditary Chief or Clan chief; Ó Bruadar (BRODER, BRODERICK, BROTHERS)
Septs (finte); Mac Braoin (BREEN, MacBREEN, BRUEN, BRUYN, BRYAN)
Location - county, barony or townland;
Cinéal (Kinship); Osraighe
Branches; Na Clanna (Mac Braoin)

Uí Duach

Clan name (Tuath); Uí Duach
Progenitor;
Hereditary Chief or Clan chief; Ó Braonain (BRENNAN, BRANNAN, BRANNON)
Septs (finte);
Location - county, barony or townland; Airgetros in Maigib Raigne, Fassadinin, Idough barony, Kilkenny.
Cinéal (Kinship); Osraighe
Branches; Clann Amhlaibh (Clan Awly of Ui Duach), Clann mic Conill, Clann c. mhic Kelowe, alias Clann mhic Gillenanaomh & Clann Muirchertaigh

Ui Berchon (Ui Bearrchon)

Clan name (Tuath); Ui Berchon (Ui Bearrchon)
Progenitor; Iachtchair, a descendant of Aengus Osrithe
Hereditary Chief or Clan chief; Ó Callaidhe (O'Kelly, O'Kealy, O'Coely)
Septs (finte);
Location - county, barony or townland; Old barony of Ibercon, forming the northern portion of the more modern barony of Ida (O'Donovan), in southeast Co. Kilkenny
Cinéal (Kinship); Osraighe
Branches;

Ui Cruinn (Uí Crinn, Uí Grine)

Clan name (Tuath); Ui Cruinn (Uí Crinn, Uí Grine)
Progenitor;
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland; Medieval 'barony' of Igrin [modern barony of Ida], in southeast Co. Kilkenny
Cinéal (Kinship); Dál Chormaic
Branches;

Uí Fairchelláin

Clan name (Tuath); Uí Fairchelláin
Progenitor;
Hereditary Chief or Clan chief; Ua hÚrachán (O'Horahan)
Septs (finte);
Location - county, barony or townland; Parish of Offerlane, Co. Leix
Cinéal (Kinship); Osraighe
Branches;

Úi Scelláin

Clan name (Tuath); Úi Scelláin
Progenitor; Scellan, who was sixth in descent from Aengus Osrithe
Hereditary Chief or Clan chief; Ó Sceallain (SCALLEN, SKALLEN, SKELLAN, SKELTON)
Septs (finte);
Location - county, barony or townland; Hui Scellain was in Sliabh Mairge, the mountain district which, extending into Kilkenny from Carlow and Queen's County, embraced the Castlewarren, Johnswell, and Kilmogar hills, in the north of the Barony of Gowran
Cinéal (Kinship); Osraighe
Branches;

Tuath-an-Toraidh

Clan name (Tuath); Tuath-an-Toraidh
Progenitor;
Hereditary Chief or Clan chief; Ua Dubhsláine (DELANEY,DELANE, DELANY, DULANE, DULANEY, O'Delany or O'Dulany )
Septs (finte);
Location - county, barony or townland; Coill Uachtarach, barony of Upper Woods, Co. Leix
Cinéal (Kinship); Osraighe
Branches;

Úi Geintich

Clan name (Tuath); Úi Geintich
Progenitor;
Hereditary Chief or Clan chief; Ua Donnachadha (Dunphy, O'Donochowe, O'Dunaghy, O'Donoghue, Donohoe, Donagh)
Septs (finte);
Location - county, barony or townland; Ogenty [Ui-Geintigh, and Tir-Ua-nGentigh], Barony of Gowran, Co. Kilkenny.
Cinéal (Kinship); Osraighe, [Mag Máil]
Branches;

Fothairt in Chairn aka Fothar Tíre

Clan name (Tuath); Fothairt in Chairn aka Fothar Tíre
Progenitor; Sétna, the son of Artt Cerp, son of Cairbre Niad, son of Cormac Már, son of Óengus Mend, son of Eochaid Find Fuath n-Airtt, son of Feidhlimidh Reachtmhar, son of Tuathal Teachtmhar
Hereditary Chief or Clan chief; Ó Lorcain (LARKIN, LARKAN, LARKEN, LARCOM, LARKING, LERKIN,)
Septs (finte);
Location - county, barony or townland; Barony of Forth, Co. Wexford
Cinéal (Kinship); Fotharta
Branches; Fothairt Fili, Fothairt Tuile, Fothairt Maige Ítha (7 Aicme (tribes), viz., Ui Deaga, Ui Setna, Ui Dimai, Ui Eircc, Ui Chormaic, Ui Niath and Ui Duirrtheacht. ), Fothairt Imchlár oc Ard Macha & Fothairt Bile.

Fothairt Feadh aka Fotharta Osnadhaigh

Clan name (Tuath); Fothairt Feadh aka Fotharta Osnadhaigh
Progenitor; Dub Indrecht m. Fergusa m. Moínaig m. Fínáin m. Rónáin m. Echach m. Báeth m. Nannida m. Féicc m. Ier m. Cathbath m. Adnaich (a quo Fothairt) m. Airt Chirp m. m. Coirpri Niad, in descent from Cormac Már m. Óengusa Mind m. Eochaid Find Fuath n-Airtt m. Feidelmid Rechtada m. Thuathail Techtmair
Hereditary Chief or Clan chief; Ó Nuallain (NOLAN, KNOWLAN- Laeghis)
Septs (finte); Ó Bolguidhir (BOLGER, BULGER), Ó Cobthach (COFFEY, COFFEE, COFFIE), Ó Luinin (Lineen),
Location - county, barony or townland; Barony of Forth, Co. Carlow
Cinéal (Kinship); Fotharta
Branches; Fothairt Airthir Liphi, Fotharta Airbrech fri Brí Ele aniar, and Fotharta Fer Cúl, Fothar Breg; alias Fothar Mac nDeichill of Bregia.

Beann Traidhe

Clan name (Tuath); Beann Traidhe
Progenitor; Cillíne m. Dochartaich m. Eóin m. Feromuin m. Aildíne m. Oirenn m. Mágach m. Cellaich Croto m. Nechta m. Lugna m. Inomuin m. Benta a quo Bentraige nominantur nó Benta filius Conchobuir m. Nessa ut alii dicunt m. Máil m. Formáil m. Sírnae m. Forich m. Rochada m. Clothnai m. Coirbb m. Sethrann m. Loga m. Cethnenn.
Hereditary Chief or Clan chief; Ó Coigligh (O'Coskry, COGLEY, KEGLEY) Clann Cosgraigh (O'Coskry, Cosgry, Coskerry, Cosgrave)
Septs (finte); Ó Beice (BECK, BEAKY, BAKEY ), Ó Bogaigh (BUGGY BUGGEY, BOGGY), Ó Cluainaigh (CLOONEY, CLONEY)
Location - county, barony or townland;
Cinéal (Kinship); Cruithin
Branches;

Laeghis

Clan name (Tuath); Laeghis
Progenitor; Fachtna m. Milige a quo Baccán m. Brain m. Eircc h-Ubulchind m. Feidelmid mc Findchada m. Fiachach Uanchind m. Dáire m. Rossa m. Ogomain m. Fergusa Múlcheist m. Fachtna m. Milige m. Intait m. Lugdach Loíchsi m. Conaill Cernaich.
Hereditary Chief or Clan chief; Ó Mordha (O'MORE, MOORE)
Septs (finte); Mac Gaethin (GAHAN, MacGEEHAN, MAGEEHAN), Mac Ceadach (KEADY, KEADIE, KEDDY, KEEDIE, KEEDY, MACKEADY), Ó Leathlobhar (LALOR, LAWLOR), Ó hArraghain (HARRIGAN, HARAGHAN, HARAHAN), Ó Liathain, Mac Laoidhigh (LEE, MacLEA, MacLEE), Ó Suaird (SWORDS SORD, SOURDES, SUARD), Ó Broithe (BROPHY, BROFIE), Ó Casain (CASHIN, KISSANE), Ó Deoradhain (DORAN, DORRIAN), Ó Dunlaing (DOWLING), Ó Duibhgainn (Deegan),
Location - county, barony or townland; Co. Laois
Cinéal (Kinship); Laeghis
Branches;

Cinel Crimthann

Clan name (Tuath); Cinel Crimthann
Progenitor;
Hereditary Chief or Clan chief; Ó Duibh (DUFF, DUFFY)
Septs (finte); Ó Dubhuidhe (Deevy or Devoy), Ó hIndreadhain (HOURIHAN)
Location - county, barony or townland; Ballyduff, Stradbally, Co. Laois. Lord of Creamhthainn (i.e. Maryborough)
Cinéal (Kinship); Laeghis
Branches; Ui Crimthainn Áin (O'Devoy)

Ui Mic Uais Breagh aka Muintir Fhiodhbhuide

Clan name (Tuath); Ui Mic Uais Breagh aka Muintir Fhiodhbhuide
Progenitor;
Hereditary Chief or Clan chief; Mac Fhiodh bhuidhe (McEvoy)
Septs (finte); Ó hIffernain (HEFFERNAN, HIFFERNANE)
Location - county, barony or townland; Mountrath, Co. Laois
Cinéal (Kinship); Laeghis
Branches; Clan Crecain (Ó hIffernain)

Ui Meith Macha alias Ui-Meith Tire

Clan name (Tuath); Ui Meith Macha alias Ui-Meith Tire
Progenitor; Imar m. Muircertaich m. Duibdarac m. Scannlain m. Indrachtaich m. Gairbid m. Ainbeith m. Mailbrigti m. Duibinnracht m. Taidg m. Innreachtaich m. Muiredaich m. Mailimuchair m. Scannlain m. Fingin m. Aedha m. Fiachrach m. Fiachrach m. Eogain m. Briuin m. Muiredaic Meith (a quo H. Meith) m. Imcadha m. Colla Da Crich m. Eachach Doimlen.
Hereditary Chief or Clan chief; Ó hInnreachtaigh (O'Hanratty)
Septs (finte); Ó hAinfeith (HANVEY, HANNAY, HANNEY), Ó Mael Brigdhe (MULREADY, MULBREEDY, MULBRIDE, MULREEDY, MURREADY, MULREDDY), Ó Gairbith (GARVEY), Ó hUarghuis (HORISH,HORISKY, HOURISKEY, WHORISKEY, WATERS, CALDWELL), Ó Beice (BECK, BEAKY, BAKEY), Ó Mearain (MARRON MARRAN, MARRANE, MARREN, MEARN), Ó Smollain (SMOLLEN,SMULLEN),
Location - county, barony or townland; Barony of Monaghan, in the County of Monaghan
Cinéal (Kinship); Síl Colla Focrích
Branches; Ui-Seaain (Ó hAinfeith), Ui-Meath-Mara [Omeath]

Fernmag, or Fer Fernmaighe [Farney]

Clan name (Tuath); Fernmag, or Fer Fernmaighe [Farney]
Progenitor; Lethlobor m. Fogartaig m. Muiredaig m. Laidgnen m. Fogartaig m. Donnacain m. Fogartaig m. Ruadrach m. Mailfothardaig m. Arthraich m. Aithechda m. Mailduib m. Mailfothardaig m. Cronain m. Fergusa m. Nadsluaig m. Daim argait m. Echach m. Cremthaind Leith m. Feicc m. Dega Duirn m. Rochatha m. Colla Fochrich m. Echdach Doimlen.
Hereditary Chief or Clan chief; Ó Ciaráin (O'Kieran)
Septs (finte); Uí Chríochain (O'Creehan, CREHAN, CREIGHTON, CRICHTON, Uí Lorcáin, Mac Cuilinn (MacQUILLAN), Ó Donnagan (DONEGAN, DONNEGAN, DONNEGANE), Ó Merligh (MARLEY, MARLIE), Ó Daimhin (DEVINE, DEVANE, DEVIN), Ó Dubhruis (DOORISH, DORISH, DORIS, DOURISH), Ó Feadagain (FEDEGAN FADDIGAN, FEDDIGAN), Ó Callada (KELLEDY KALLADIE, KEELEDIE, KELEEDY), Ó Leanain (Leynan), Ó Luain (ÓLOAN, LOON, LUAN, LAMB), Ó Maoilfhinn (MALINN MALLIN, MALYNN, MILLYNN, MULLIN), Ó Marcaigh (MARKEY MARKAY, RIDER, RYDER), Mac Uaid (MacQUAID MacQUADE), Ó Reannachain (RENEHAN RENAGHAN, RENIGHANE, RONAGHAN), Mac Ruari (RORY MacGRORY, MacRURY), Mac Sceachain (SKEHAN SKEEHAN, THORNTON), Mac Soilligh (SOLLY, SOLLEY, SOLEY, SULLY), Ó Tuathail (Toal), Ó Tomaltach (TUMELTY, TOMALTY), Mac Cuairt (MacCOURT, COURTNEY), Mac Raghiallaigh (CRILLY, CROLY, CROLLY),
Location - county, barony or townland; Barony of Farney, Co. Monaghan.
Cinéal (Kinship); Cenél Rochada, Síl Colla Focrích
Branches;

Clann Lugainn

Clan name (Tuath); Clann Lugainn
Progenitor; Lugain, son of Irgalach, son of Eignich, son of Cormac, son of Fergus, son of Aed, son of Cormac, son of Cairpre Dam Argait. Daim Argait (Corpri) son of Echach son of Cremthaind Leith son of Feicc son of Dega Duirn son of Rochatha son of Colla Fochríth
Hereditary Chief or Clan chief; Mag Uidhir (MAGUIRE, MCGUIRE, GUIRE, GUIREY, QUIREY) Meicc h-Uidir
Septs (finte); Ó hEgneach (HEANY, BIRD, HEENY, HEGNEY, HIGNY), Ó Dubhdhara (DARRAGH, DARRA, DARROUGH, OAKS), Mac Maghnuis (McManus), Mac Gafraidh (MacCaffrey, Godfrey), Mac Gothraidh (MacCORRY MacGORRY, GODFREY, GOHERY, GOFFREY ), MacAmhlaimh (MacAuley), Mac Asidha (Cassidy), Mac Gilla Uidhir (MacALEAR, MacELEER), Mac Carmaic (MacCORMACK), Mac Aodh (MacGEE, GEE, MAGEE), Mac Ailghile (LILLY CALILLY, LELY, LILLIE, MacALILLY, MacALYLY), Mac Lochlainn (LOUGHLIN MacLACHLAN), MacMurchadha (MacMORROW, Murrow -Clann Aodh), Mac Giolla Iosa (MacALEESE GILEECE, MacLEECE), Mac Con Uladh (MacANALLY, COWLEY, CULLOO), Mac Braoin (BREEN, MacBREEN),
Location - county, barony or townland; Co. Fermanagh
Cinéal (Kinship); Síl Daim Argait (Uí Cremthainn)
Branches;

Muintir Pheodachain (or Muintir Feodachain)

Clan name (Tuath); Muintir Pheodachain (or Muintir Feodachain)
Progenitor; Cormac, son of Cairpre Dam Argait
Hereditary Chief or Clan chief; Mac Giolla Finnein (MacALINION, GILLEEN, GLENDON, LEONARD)
Septs (finte);
Location - county, barony or townland;
Cinéal (Kinship); Síl Daim Argait (Uí Cremthainn)
Branches;

Muintir Caeman

Clan name (Tuath); Muintir Caeman
Progenitor; Cormac, son of Cairpre Dam Argait
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland;
Cinéal (Kinship); Síl Daim Argait (Uí Cremthainn)
Branches;

Clann Fergaile

Clan name (Tuath); Clann Fergaile
Progenitor; Cormac, son of Cairpre Dam Argait
Hereditary Chief or Clan chief; Ó Baoigheallain (BOYLAN, BOYLAND)
Septs (finte); Mac Giolla Coisgle (CUSKELLY, CUSKLEY, CUSKERY, MacCUSHELY, QUISKELLY, QUOSKLY),
Location - county, barony or townland;
Cinéal (Kinship); Síl Daim Argait (Uí Cremthainn)
Branches;

Sil nDaimine

Clan name (Tuath); Sil nDaimine
Progenitor; Daimíne, son of Cairpre Dam Argait, son of Eocho, son of Crimthann Lethan, son of Fiacc, son of Daig Duirn, son of Rochaid, son of Colla Fochríth (da-Chrioch).
Hereditary Chief or Clan chief; O'Maolruanaidh (Mulrooney)
Septs (finte);
Location - county, barony or townland; Co. Fermanagh
Cinéal (Kinship); Síl Daim Argait, Uí Chremthaind
Branches;

Síl Tuathail an Tuaiscirt aka Fir Leamhna

Clan name (Tuath); Síl Tuathail an Tuaiscirt aka Fir Leamhna
Progenitor; Tuathal, son of Daimíne (a quo Síl Daimini), son of Cairpre Damargait, son of Echach, son of Crimthann, son of Fiacc, son of Daig Duirn, son of Rochaid, son of Colla Fochríth
Hereditary Chief or Clan chief; Ó Caomhain
Septs (finte);
Location - county, barony or townland; Clogher (Clochar mac nDaimin) in modern county Tyrone.
Cinéal (Kinship); Síl Daim Argait (Uí Cremthainn)
Branches;

Clan Ceallaigh

Clan name (Tuath); Clan Ceallaigh
Progenitor; Daimine, son of Cairpre Dam Argait
Hereditary Chief or Clan chief; Mac Domhnaill (MacDONNELL)
Septs (finte); Ó Flanagain (Flanagan)
Location - county, barony or townland; Lord of Clankelly, Lisnaskea, Fermanagh
Cinéal (Kinship); Síl Daim Argait (Uí Cremthainn)
Branches;

Clann Nadsluaigh

Clan name (Tuath); Clann Nadsluaigh
Progenitor; Nadsluaigh, son of Cairpre Dam Argait, son of Eocho, son of Crimthann Lethan, son of Fiacc, son of Daig Duirn, son of Rochaid, son of Colla Fochríth (da-Chrioch)
Hereditary Chief or Clan chief; Mac Mathghamna (MacMAHON, MacMAHAN, MAGHAN)
Septs (finte); Mac Íomhar (MacGiver, KEEVER MacKEEVER, MACEVER, MACKEVER, KEVER), Mac Ardghail (MacARDLE, ARDALL, MacCARDLE, CARDWELL), Mac Bradaigh (Brady), Ó Cearbhail (CARROLL, CAROOL), Mac Pilib (MacPHILLIPS)
Location - county, barony or townland; Clones, Co. Monaghan
Cinéal (Kinship); Síl Daim Argait
Branches; McMahon (MacArtghail, MacIomhar & MacPilib), O'Carroll (Mac Bradaigh).

Uí Briúin Archaille

Clan name (Tuath); Uí Briúin Archaille
Progenitor; Brian son of Daig Duirn son of Rochaid son of Colla Fochríth
Hereditary Chief or Clan chief; Ua Tuamain
Septs (finte); Barony of Dungannon, co. Tyrone, which is located on the western side of Lough Neagh.
Location - county, barony or townland; Co. Fermanagh
Cinéal (Kinship); Síl Daim Argait (Uí Cremthainn)
Branches;

Uí Labrada

Clan name (Tuath); Uí Labrada
Progenitor;
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland; Co. Fermanagh
Cinéal (Kinship); Cenél Rochada
Branches;

Dál n-Oaich

Clan name (Tuath); Dál n-Oaich
Progenitor; Crimthann Oach, son of Fiacc, son of Daig Duirn, son of Rochaid, son of Colla Fochríth
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland; Co. Fermanagh
Cinéal (Kinship); Cenél Rochada
Branches;

Uí Meic Brócc

Clan name (Tuath); Uí Meic Brócc
Progenitor; Echdach Amainsen, son of Crimthann, son of Fiacc, son of Daig Duirn, son of Rochaid, son of Colla Fochríth
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland; Co. Fermanagh
Cinéal (Kinship); Cenél Rochada
Branches;

Úa Bresail Airthir [Orior]

Clan name (Tuath); Úa Bresail Airthir [Orior]
Progenitor; Buachalla m. Conchobuir Corraig m. Máel Dúin m. Fíngin m. Rónáin m. Tuathail m. Ailella m. Conaill m. Féicc m. Bressail m. Feidelmid m. Fiachrach Cassáin m. Collai Fochríth.
Hereditary Chief or Clan chief; Ó Céalecháin (KEALAGHAN, KEALAHAN, KEELAGHAN)
Septs (finte); Ó Cernachain (KERNAGHAN, KEARNAGHAN), Ó Madadhain (Madigan), Ó Tréinfhir (TRAINOR TRAINER, TRAYNER), Mac Acadain (MacCADDEN, CADIGAN, MacADAM, MacADAN), Ó Caisile (CASSILY CASHEL, CASLEY, CASSELL, CASSELY, CUSHLEY), Ó Dalachain (DULLAHAN, DALLAGHAN, DALLAHAN, DALLAN, DOLOGHAN),
Location - county, barony or townland; Northern Armagh
Cinéal (Kinship); Airthir, Síl Fiachra Cassán
Branches; Clann Fermaighe (Mac Acadain), Muintir Caiseil

Úa Bresail Macha

Clan name (Tuath); Úa Bresail Macha
Progenitor; Cummascaig m. Conchobuir Chorraig m. Mailduin m. Finghin m. Ronain m. Thuathail m. Ailella m. Conaill m. Feicc m. Bressail m. Feidlimthe m. Fiachach m. Colla Fochrich.
Hereditary Chief or Clan chief; Ó Gairbith (GARVEY)
Septs (finte); Ó Gabhain (GOAN, SMITH, SMYTH), Ó Cairregain (KERRIGAN, CARRIGAN, CARAGHAN, CARAHAN),
Location - county, barony or townland; Northern Armagh
Cinéal (Kinship); Airthir
Branches;

Uí Echdach alias Ui Eachach Orior

Clan name (Tuath); Uí Echdach alias Ui Eachach Orior
Progenitor; Murcad m. Ruaidri m. Muiredaich m. Ailella m. Cumascaigh m. Echadon m. Ruadacan m. Cellaich m. Ruadrach m. Conmaeil m. Airmedaich m. Feradaich m. Amalga m. Aililla m. Echach m. Feidlimthe m. Fiachrach m. Colla Da Crich.
Hereditary Chief or Clan chief; Ó Ruadhacain (ROGAN, REDEGAN, ROHAGAN, ROOGAN, RODAGHAN)
Septs (finte); Ó Domhnaill (DONNELL ), Mag Labhradha (GLORY, GLORNEY, MAGLORY, MacGLORY, MacLAVERY, LAVERY, MacLOWRY), Ó hAileagain (HALLAHAN, HALLIGAN, HOLLEGANE, HOLLIGAN),
Location - county, barony or townland; Northern Armagh
Cinéal (Kinship); Airthir
Branches; Síl Ciarain Ua nEchach, Clann-Ruadhagain

Uí Nialláin (Clan Cernaich)

Clan name (Tuath); Uí Nialláin (Clan Cernaich)
Progenitor; Nialláin m. Féicc m. Feidelmid m. Fiachrach Cassáin m. Collai Fochríth.
Hereditary Chief or Clan chief; Ua hAnluain (O'Hanlon)
Septs (finte); ÓLorcain (LARKIN, LORKING, LORCAN, LORCAYNE, LURKAN, LURKAYNE), Ó hUidhrin (Herane), Ó hAedhagain (HEGAN EAKIN, EAKEN,HAGAN), Ó Muanain (MOYNAN MONAN, MONANE, MONAYNE, MONYNE, MOONAN, MOYNE), Mac Riabhaigh (MacREEVY MacCREVEY, MacGREEVEY), Mac an tSionnaigh (TINNEY, MacASHEENY, MacATINNEY, ÓTINNEY, TINNY), Mac Gilla Fhiondain (MacALINDON), Ó Cearnaigh (CARNEY, CARNY), Mac Concaille (MacCONKEEL, MacENHILL, WOODS), Ó Foirredh (FUREY, FURY), Ó hEoir (HAIRE HAIR, HARE)
Location - county, barony or townland; The baronies of Oneilland East and West in modern county Armagh.
Cinéal (Kinship); Airthir
Branches;

Uí Dorrthainn (alias Ui Dorthinn, Dorthaind, Dorethainn, Tortain)

Clan name (Tuath); Uí Dorrthainn (alias Ui Dorthinn, Dorthaind, Dorethainn, Tortain)
Progenitor; Dorthon, son of Fiacc, son of Feideilmid, son of Fiachra Cassán, son of Colla Fochríth
Hereditary Chief or Clan chief; Maelan Gae Mor
Septs (finte); O'Maelan (MULLAN, MULLEN, MULLIN)
Location - county, barony or townland; Brechmag, centered perhaps near Ardbraccan, 2 miles west of Navan, co. Meath
Cinéal (Kinship); Airthir
Branches;

Uí Tréna

Clan name (Tuath); Uí Tréna
Progenitor; Trian son of Feidhlimidh, son of Fiachra Cassan, son of Colla Da Crich.
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland; Co. Armagh
Cinéal (Kinship); Síl Fiachra Cassán
Branches; Craebh Carthaind

Uí Eochada

Clan name (Tuath); Uí Eochada
Progenitor; Fiachra Cassan, son of Colla Da Crich.
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland; Co. Armagh
Cinéal (Kinship); Síl Fiachra Cassán
Branches;

Uí Cruind

Clan name (Tuath); Uí Cruind
Progenitor; Fiachra Cassan, son of Colla Da Crich.
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland; Co. Armagh
Cinéal (Kinship); Síl Fiachra Cassán
Branches;

Uí Maic Caírthinn alias Cenél Meic Cárthind

Clan name (Tuath); Uí Maic Caírthinn alias Cenél Meic Cárthind
Progenitor; Cairthand (a quo H. Mc. Carthaind), son of Eichin, son of Bec (ri Airgiall) m. Cuanach m. mc. Dairi mc. Feidhlimidh mc. Echin mc. Fiacrach Tort mc. Echach mc. Colla Uais
Hereditary Chief or Clan chief; Ó Cochlainn (COLGAN)
Septs (finte); Ó Conghaile (Connell),Ó Cein (KEENE, KEEN, KAIN, KANE), Mac Giolla Michill (MacMEEL MacGILMIHILL, MacGILMICHILL, MITCHELL)
Location - county, barony or townland; Lough Foyle, Tirkeeran, County Londonderry,
Cinéal (Kinship); Uí Meic Uais, Síl Colla Uais
Branches; Clan Conghail (Mac Giolla Michill)

Uí Fiachrach Arda Srátha

Clan name (Tuath); Uí Fiachrach Arda Srátha
Progenitor; Crichain m. Cathasaich m. Mailcothaig m. Guairi m. Forannan m. Ainmerech m. Cormaic m. Dochairtaig m. Fiachach m. Eirc m. Eachach m. Colla Oss
Hereditary Chief or Clan chief; Ó Críochain (O'Crehan or Creighton)
Septs (finte); Ó hAedha (ÓHea),
Location - county, barony or townland; Ardstraw, Tyrone
Cinéal (Kinship); Uí Meic Uais, Síl Colla Uais
Branches;

Ui Tuirtre

Clan name (Tuath); Ui Tuirtre
Progenitor; Floind (otait Ui Loind) m. Muiredaig m. Indrachtaigh m. Reachtabrat m. Mailcraibhi m. Mailfotartaigh m. Suibni m. Furodran m. Bece m. Cuanach m. Dairi m. Feidhlimthe m. Fechin m. Fiacrach Tuirtri m. Eachach m. Colla Uais.
Hereditary Chief or Clan chief; Mac Fhloinn (O'Flynn or O'Lynn)
Septs (finte); Ó Foirbhithe (FURPHY, FURFIE, FURPHEY, FURVEY), Ó hUid (HOOD HOUD, HUDE, MacHOOD, MAHOOD, ÓHOUD), Ó Maelruanaidh (MULROONEY, MULRONEY, MURRONY), Ó Domhnaillain (DONNELLAN, DONELAN),
Location - county, barony or townland; West of Lough Neagh (in modern County Tyrone), as well as northwest of the great Lough in the modern barony of Loughinsholin, County Londonderry.
Cinéal (Kinship); Uí Meic Uais, Síl Colla Uais
Branches;

Uí Mac Uais Mide

Clan name (Tuath); Uí Mac Uais Mide
Progenitor; Colla Uais.
Hereditary Chief or Clan chief; Ua Comhraidhe (O'Curry)
Septs (finte);
Location - county, barony or townland; Moygoish barony, co. Westmeath)
Cinéal (Kinship); Uí Meic Uais, Síl Colla Uais
Branches;

Uí Mac Uais Breg

Clan name (Tuath); Uí Mac Uais Breg
Progenitor; Colla Uais.
Hereditary Chief or Clan chief; ÓhInnascaigh (Ennis)
Septs (finte); Ó Minnegain (MINNEGAN, MINNICAN), Ó Cormaidhe (CORMIE CORMY, CORMEY, COOMIE, CUMEY), Ó Dubheoin (DEVINE, DEVANE, DEVIN),
Location - county, barony or townland; Upper Kells/Lower Navan baronies, co. Meath
Cinéal (Kinship); Uí Meic Uais, Síl Colla Uais
Branches;

Cenel mBecce

Clan name (Tuath); Cenel mBecce
Progenitor; Suibni (a quo Cenel mBece) mc. Mailodrain mc. Suibne mc. Bec mc. Cuanach mc. Dairi mc. Feidhlimidh mc. Echin mc. Fiacrach Tort mc. Echach mc. Colla Uais
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland;
Cinéal (Kinship); Síl Colla Uais
Branches;

Uí Dáire

Clan name (Tuath); Uí Dáire
Progenitor;
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland;
Cinéal (Kinship); Síl Colla Uais
Branches;

Uí Cormaic

Clan name (Tuath); Uí Cormaic
Progenitor; Brion, son of Echach, son of Colla Uais
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland;
Cinéal (Kinship); Síl Colla Uais
Branches;

Spare Blank

Clan name (Tuath);
Progenitor;
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland;
Cinéal (Kinship);
Branches;

Spare Blank

Clan name (Tuath);
Progenitor;
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland;
Cinéal (Kinship);
Branches;

Spare Blank

Clan name (Tuath);
Progenitor;
Hereditary Chief or Clan chief;
Septs (finte);
Location - county, barony or townland;
Cinéal (Kinship);
Branches;

References

Ireland's History in Maps - Tuath and Territory Index
Ireland's HIstory in Maps - the Northern Ui Neill
Leabhar na nGenealach: The Great Book of Irish Genealogies. De Búrca Books, Dublin, 2004. Edited by Nollaig Ó Muraíle.
T.H. Mullin and J.E. Mullin (1966). "The Ulster Clans", North-West Books
Robert Bell (1988) . "The Book of Ulster Surnames", The Black Staff Press

Gaels

General history	Gaelic Ireland High King of Ireland Gaelic Irish kingdoms Dál Riata Alba Nine Years' War Statutes of Iona Flight of the Earls 1641 Rebellion Act for the Settlement of Ireland 1652 Jacobite risings Penal Laws Great Hunger Irish diaspora Highland Clearances Gaelic Revival Gaeltacht Gàidhealtachd

Gaelic culture	Ogham Brehon law Gaelic mythology Lebor Gabála Érenn Gaelic warfare Gaelic astrology Gaelic kinship Bardic poetry Gaelic literature (Early Irish, Modern Irish, Scottish Gaelic & Manx) Gaelic type Insular script Fáinne Gaelic music Sean-nós song Oireachtas na Gaeilge Am Mòd Gaelic games Highland games Insular Christianity Gaelic Christian mission

Language	Primitive Irish Old Irish Middle Irish Classical Gaelic Irish Manx Scottish Gaelic

Major tribes or clans	Connachta (incl. Uí Néill, Clan Colla, Clan Donald, Uí Maine, etc) Dál gCais (incl. Déisi) Eóganachta Érainn (incl. Dál Riata, Corcu Loígde, Clan Conla, Dál Fiatach, etc) Laigin Ulaid (incl. Dál nAraidi, Conmhaícne, Ciarraige, etc)

DNA haplogroups	R-S971 (Clan Colla) R-M222 (Connachta & Uí Néill) R-L21 (Dál Fiatach) R-L226 (Dál gCais) R-CTS4466 (Eóganachta) R-L159.2 (Laigin)

Prominent organisations	Údarás na Gaeltachta Foras na Gaeilge Bòrd na Gàidhlig Culture Vannin Conradh na Gaeilge An Comunn Gàidhealach Manx Gaelic Society Seachtain na Gaeilge Gael Linn ULTACH Trust Clì Gàidhlig Comunn na Gàidhlig Columba Project Clans of Ireland Association of Highland Clans and Societies

Related subjects	Celts Norse–Gaels (incl. Uí Ímair & Clan MacLeod) Kingdom of the Isles Gaelicisation

Gaelic Irish genealogy

General	Irish clans (list) Irish annals Irish bardic poetry Fili Ollamh Seanchaí Gaelic nobility of Ireland Chief of the Name Irish heraldry Irish diaspora Genealogical Society of Ireland Genealogical Office National Archives of Ireland Clans of Ireland Standing Council of Irish Chiefs and Chieftains

Works	Chronicle of Ireland Triallam timcheall na Fodla Tuilleadh feasa ar Éirinn óigh Leabhar Adhamh Ó Cianáin Leabhar Cloinne Maoil Ruanaidh Leabhar Ua Maine Leabhar na nGenealach Ó Cléirigh Book of Genealogies An Leabhar Muimhneach Annals of the Four Masters Griffith's Valuation Census of Ireland, 1901 Census of Ireland, 1911

Genealogists	Seán Mór Ó Dubhagáin Giolla na Naomh Ó hUidhrín Adhamh Ó Cianáin Faolán Mac an Ghabhann na Scéal Cú Choigcríche Ó Cléirigh Dubhaltach Mac Fhirbhisigh James Ware Geoffrey Keating James Terry Chevalier O'Gorman John O'Hart Patrick Wolfe Edward MacLysaght

Connachta

Kindreds and septs

Connachta

Uí Briúin	O'Conor Don O'Conor Roe O'Conor Sligo Murtagh O'Conor MacGeraghty O'Finaghty O'Concannon MacTeige MacBrannan O'Flanagan MacDermot MacDonagh MacManus MacDockery O'Beirne O'Flaherty O'Rourke O'Reilly O'Sheridan

Uí Fiachrach	MacClellan O'Heyne O'Cleary O'Shaughnessy O'Cahill MacKilkelly O'Dowd MacFirbis O'Cann O'Coyne O'Carney O'Towey O'Gaughan O'Murray

Northern Uí Néill

Cenél Conaill	O'Donnell O'Doherty O'Gallagher Dunkeld O'Boyle O'Cannon MacMenamin

Cenél nEógain	O'Neill MacShane (Johnson) MacNeil Maclachlan Lamont MacEwen MacSweeney MacCaul O'Cahan O'Devlin O'Gillan O'Kieran O'Donnelly O'Gormley O'Brallaghan MacLoughlin

Southern Uí Néill

Clann Cholmáin & Síl nÁedo Sláine	O'Melaghlin (MacLoughlin) O'Molloy MacGeoghegan O'Higgins MacCary MacAuley

Clan Colla

Uí Maine

O'Kelly
O'Donnellan
O'Madden
O'Downey
O'Cleary
O'Concannon
O'Naughton
O'Mullally
MacEgan
O'Connell

Personalities

Literature

Places

Battles

Eóganachta

Kindreds and septs

Eóganachta

Eóganacht Chaisil	MacCarthy Mór MacCarthy Duhallow MacCarthy Reagh MacCarthy Muskerry MacAuliffe O'Sullivan Mór O'Sullivan Beare MacGillycuddy O'Callaghan O'Donoghue

Eóganacht Glendamnach	O'Keeffe

Eóganacht Locha Léin	O'Cahill O'Flynn O'Moriarity MacAngus O'Carroll O'Scanlan

Eóganacht Raithlind	O'Mahony O'Donoghue O'Long O'Duggan O'Feehin O'Leary O'Donnell O'Connell O'Linchy (Lynch) O'Hea O'Cahalane O'Coughlan O'Cannifee O'Bogue O'Cronin O'Flynn O'Flahiffe O'Connelly

Eóganacht Áine	O'Kirwick O'Muldoon O'Kenealy O'Gunning

Uí Fidgenti &
Uí Liatháin

Personalities

Places

Battles

Érainn

Kindreds and septs

Dál Riata	MacAlpin MacGregor MacDuff Mackintosh MacLaren Macfie Macnab MacAulay MacAdam Mackinnon MacQuarrie Paterson

Múscraige	O'Donegan O'Donnelly O'Furey O'Hea O'Mulvany O'Dowling O'Cullinane O'Flynn O'Quirke

Corcu Duibne	O'Falvey O'Shea O'Connell

Corcu Baiscind	O'Baskin MacDermot O'Donnell

Dál Fiatach	MacDunlevy MacNulty MacLea O'Haughey

Corcu Loígde	O'Coffey O'Downey O'Driscoll O'Fealy O'Flynn O'Hennessy O'Leahy O'Leary O'Longan O'Doheny O'Doughan O'Dunlea O'Hea O'Dinneen O'Cronin O'Baire O'Henegan O'Kevane

Clann Conla	MacGilpatrick (Fitzpatrick) O'Delany O'Horahan O'Brody O'Kealy O'Phelan O'Brophy O'Coveney O'Gloherny O'Dunphy O'Carroll O'Brennan O'Queally MacBreen O'Broder O'Dea

Conaille Muirtheimne	O'Connolly

Personalities

Literature

Places

Dál gCais

Kindreds and septs

Déisi Tuisceart

Uí Bloid	O'Ahearne O'Boland Coombe O'Cosgrave Eustace MacGlynn O'Kearney O'Lonergan MacArthur MacConsidine MacGrath MacLysaght MacMahon O'Muldowney O'Brennan O'Brien O'Casey O'Crotty O'Hogan O'Hurley O'Kelleher O'Kennedy O'Meara O'Noonan O'Reagan Power O'Quirke O'Scanlan O'Twomey

Uí Caisin	MacClancy MacDurkin O'Flattery Flood Harley O'Hartigan O'Hickey Hogg O'Killeen MacNamara MacInerney O'Neilan O'Hay (Hayes) O'Grady Stoney Torrens O'Tubridy

Cineal Fearmaic	O'Quilty MacBrody O'Dea O'Heffernan O'Quinn Perkin

Delbhna	Faherty MacConroy Heney Flannagan Fenelon Mulholland Logue Scully

Déisi Muman

O'Phelan
O'Bric
MacHugh

Personalities

Literature

Places

Battles

Laigin

Kindreds and septs

Dál Niad Cuirp

Uí Máil	O'Tighe O'Kelly

Uí Dúnlainge	Fitzdermot O'Toole O'Byrne MacKeogh O'Cosgrave

Uí Cheinnselaig	MacMurrough Kinsella O'Finneran O'Murphy O'Garvey O'Hartley O'Ryan Morrow

Uí Failghe	O'Connor Faly O'Dunne O'Dempsey Kavanagh Branagh MacGilpatrick (Fitzpatrick) O'Dwyer O'Holohan O'Hennessy

Uí Bairrche	O'Gorman Kearney Tracy Hughes Mooney Carney

Uí Enechglaiss	O'Feary

Uí Crimthainn Áin	O'Duff

Dál Cairpre Arad

O'Kealy

Dál Messin Corb

O'Farrell

Personalities

Places

Battles

Ulaid

Kindreds and septs

Dál nAraidi

Uí Echach Cobo	MacGowan Magennis MacCartan O'Linchy (Lynch)

Loígis	O'More O'Kelly O'Deevy O'Doran O'Lalor O'Dowling MacEvoy O'Bergin O'Mulcahy

Soghain	O'Manning MacWard O'Scurry O'Lennon MacCashin Gilly MacGing

Conmhaícne

Conmaicne Mara	O'Kealy MacConneely O'Devaney O'Cloherty MacFolan

Conmaicne Magh Réin & Muintir Eolais	MacRannall MacDorcy O'Mulvey O'Farrell O'Beglin Borden O'Hallissy O'Murry O'Curneen O'Mulooly MacMullock O'Doonan O'Kearon MacCoogan MacGaynor O'Quinn MacShaffrey MacConnick O'Keegan MacLeavy MacMorrow MacShane O'Sullahan O'Tormey

Conmaicne Cuile Toladh	O'Tolleran O'Colleran O'Moran Martin

Conmaicne Mide	MacRourke O'Breen O'Toler

Ciarraige

Corco Mruad

O'Conor Corcomore
O'Loughlin
O'Flaherty
O'Deely
O'Drennan
O'Melody
MacCurtin
O'Davoren

Personalities

Literature

Places

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