Baron Inchiquin
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The title Baron Inchiquin (pronounced "Inchquin") is one of the older titles in the Peerage of Ireland. It was created in 1543 for Murrough O'Brien, Prince of Thomond, along with the Earldom of Thomond, which passed by a special remainder on his death to his nephew and later became extinct. In 1654 the 6th Baron was created Baron O'Brien and Earl of Inchiquin, and in 1800 the 5th Earl was created Marquess of Thomond. In 1801 the 1st Marquess of Thomond was further created Baron Thomond, of Taplow in the County of Buckingham, in the Peerage of the United Kingdom to allow him to sit in the House of Lords. The Barony of Thomond (not created with the special remainder attached to the Marquessate) became extinct on the death of the 1st Marquess in 1808, but his nephew and successor, the 2nd Marquess, was created Baron Tadcaster, of Tadcaster in the County of York, in 1826. This peerage became extinct on his death in 1846. All the remaining peerages except the original Barony of Inchiquin (the Marquessate of Thomond, Earldom of Inchiquin and Barony of O'Brien) became extinct on the death of the 3rd Marquess in 1855.
In the Gaelic nobility, Lord Inchiquin continues to be The O'Brien, Chief of the Name, Prince of Thomond.
[edit] Barons Inchiquin (1543)
- Murrough O'Brien, 1st Earl of Thomond, 1st Baron Inchiquin (d. 1551)
- Dermod O'Brien, 2nd Baron Inchiquin (d. 1557)
- Murrough McDermot O'Brien, 3rd Baron Inchiquin (1550-1574)
- Murrough O'Brien, 4th Baron Inchiquin (1563-1597)
- Dermod O'Brien, 5th Baron Inchiquin (1594-1624)
- Murrough O'Brien, 1st Earl of Inchiquin, 6th Baron Inchiquin (1618-1674), military commander during the Irish Confederate Wars (1643-48), first for the English Parliament, then Royalist commander during the Cromwellian conquest of Ireland (1649-53) during the Wars of the Three Kingdoms.
- William O'Brien, 2nd Earl of Inchiquin, 7th Baron Inchiquin (1640-1692)
- William O'Brien, 3rd Earl of Inchiquin, 8th Baron Inchiquin (1662-1719)
- William O'Brien, 4th Earl of Inchiquin, 9th Baron Inchiquin (1700-1777)
- Murrough O'Brien, 1st Marquess of Thomond, 5th Earl of Inchiquin, 10th Baron Inchiquin, 1st Baron Thomond (1726-1808)
- William O'Brien, 2nd Marquess of Thomond, 6th Earl of Inchiquin, 11th Baron Inchiquin, 1st Baron Tadcaster (1765-1846), elected a Representative Peer in 1816
- James O'Brien, 3rd Marquess of Thomond, 7th Earl of Inchiquin, 12th Baron Inchiquin (1768-1855)
- Lucius O'Brien, 13th Baron Inchiquin (1800-1872), elected a Representative Peer in 1863
- Edward Donough O'Brien, 14th Baron Inchiquin (1839-1900), elected a Representative Peer in 1873
- Lucius William O'Brien, 15th Baron Inchiquin (1864-1929), elected a Representative Peer in 1900
- Donough Edward Foster O'Brien, 16th Baron Inchiquin (1897-1968)
- Phaedrig Lucius Ambrose O'Brien, 17th Baron Inchiquin (1900-1982)
- Conor Myles John O'Brien, 18th Baron Inchiquin (b. 1943)
Heir Presumptive: Major Murrough Richard O'Brien (b. 1910) (a grandson of the 14th Baron and Lord Inchiquin's first cousin once removed)