William Liath de Burgh

Sir William Liath de Burgh (; ; died 1324) was an Irish noble and Justiciar of Ireland (1308–09). He was an ancestor of the Mac William Uachtar and Mac William Íochtar who were earls of Galway and Mayo respectively. Background De Burgh was a son of William Og de Burgh, who was killed at the Battle of Áth-an-Chip or Athankip in 1270, and a nephew of Walter de Burgh, 1st Earl of Ulster (died 1271). He was nicknamed liath, Gaelic for grey, though the reasons are unknown. Career