William Og de Burgh

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William Og de Burgh, also known as William fitz Richard Mor de Burgh, was a son of Richard Mor de Burgh. He was killed at the Battle of Athanchip by the Ua Conchobair's in 1270. He was survived by at least one son, Sir William de Burgh, also known as William Liath Burke, Warden of Ireland, who died in 1324.

William Og's main claim to fame is as the ancestor of the Mac William Iochtar, the leader of The Bourkes of Mayo.

[edit] Mac William Iochtar Genealogy

 William de Burgh, d. 1204.
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 Richard Mor de Burgh, d.1242.
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 William Og de Burgh, k. 1270.
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 Sir William the grey de Burgh, d.1324.
=Finola ni Brian Roe O'Brian, King of Thomond.
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 Sir Edmond Albanach Bourke, 1st Mac William Iochtar, d.1375.
=Sadhbh ni Dermot O'Malley, King of Ui Maill.  
=Finola ni O'Kelly, King of Ui Maine.
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 Sir Thomas Bourke, 2nd Mac William Iochtar, d.1401.
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 Walter  Edmond na Feasoige  Thomas  John  Richard, d.1469.
              d.1458.