John de Burgh (1286 – 18 June 1313) was the son of Richard Óg de Burgh 2nd Earl of Ulster and Margaret de Burgh.Heir apparent to the Earldom of Ulster he married (as her first husband) in Waltham Abbey Essex on September 30 1308 Elizabeth de Clare sister of Earl of Gloucester and Hertford. She was the founder of Clare College Cambridge and a granddaughter of King Edward I of England.
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