William Donn de Burgh, 3rd Earl of Ulster, the "Brown Earl," (1312-1333) was the grandson of Richard Og de Burgh, 2nd Earl of Ulster via his second son John. Richard Og de Burgh, also known as Richard de Burgh, was the 2nd Earl of Ulster, 3rd Lord of Connacht. ...

He was murdered in 1333 and was survived by an only child, Elizabeth de Burgh, Duchess of Ulster who married Lionel of Antwerp, third son of Edward III of England. Elizabeth de Burgh, Duchess of Clarence, suo jure Countess of Ulster, born 1332, died 1363. ... Lionel of Antwerp, Duke of Clarence, (November 29, 1338 - October 7, 1368) was the third son of Edward III of England, and was so called because he was born at Antwerp, Belgium. ... Edward III (13 November 1312 – 21 June 1377) was one of the most successful English kings of medieval times. ...

Upon the death of William Donn ("donn" is Irish for brown (hair), hence his nickname) the various factions of the de Burghs, now called Burke, began a civil war for supremacy.

The factions were headed by Sir Ulick Burke, 1st Mac William Uachtar or Clanricarde (d.1353); Sir Edmond Albanach Bourke, 1st Mac William Iochtar (d.1375); and Sir Edmond de Burgh of Castleconnell (k.1338), ancestor of the Bourkes of Clanwilliam in Munster. Sir Ulick Burke, great-great-great-grandson of William de Burgh, first Mac William Uachtar or Clanricarde. ... Clanricarde was both a territory and a title - The Clanricarde used to describe the Burkes of what is now Co. ... For other places with the same or similar names, and other uses of the word, see Munster (disambiguation). ...

See Burke Civil War 1333-38. Richard Og de Burgh, also known as Richard de Burgh, was the 2nd Earl of Ulster, 3rd Lord of Connacht. ... The title of Earl of Ulster has been created several times in the Peerages of Ireland and the United Kingdom. ... Elizabeth de Burgh, Duchess of Clarence, suo jure Countess of Ulster, born 1332, died 1363. ... Upon the death of William Donn de Burgh, 3rd Earl of Ulster, the various factions of the de Burghs, now called Burke, began a civil war for supremacy among each other. ...