John de Burgh

Who was John de Burgh?

John de Burgh 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 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. Gloucester in turn married John's sister Matilda.

John and Elizabeth had one son:

William Donn de Burgh, 3rd Earl of Ulster

However, he died in Galway the next year, leaving his infant son William heir apparent to the Earldom.