William Liath de Burgh

Sir William Liath de Burgh was an Anglo-Irish noble, son of William Óg de Burgh, who spent much of his career fighting for his cousin, the Earl of Ulster. He first appears in 1290, defeated in a skirmish with the Mac Coughlans.

He married Finnguala Ní Bhriain, daughter of Brian Ruad, King of Thomond, and served as Justiciar of Ireland from 1308 to 1309. His sons Edmond Albanach and Ulick founded the Mayo and Clanricarde branches of the Burkes. He died in 1324.