John de Burgh (died 1313)

Heir apparent to the Earldom of Ulster, he married (as her first husband) in Waltham Abbey, Essex, on 30 September 1308, Elizabeth de Clare, sister of Gilbert de Clare, 7th Earl of Hertford and 8th Earl of Gloucester. She was the founder of Clare College, Cambridge, and a granddaughter of King Edward I of England. Gloucester in turn married John's sister Maud. ==Family==

John and Elizabeth had one son: • William Donn de Burgh, 3rd Earl of Ulster (1312–1333) However, John died in Galway the next year, leaving his infant son William heir to the Earldom. ==Ancestry==