Edmond de Burgh
Sir Edmond de Burgh (1298–1338), also called Edmond of Clanwilliam, was an Anglo-Irish knight and a son of Richard Óg de Burgh, second Earl of Ulster, and Margery de Burgh. He married Sláine O'Brien and was ancestor of the Burkes of Clanwilliam.
In 1338, while visiting the Augustinian friars at Ballinrobe, he was seized at the friary by his cousin Edmond Albanach Burke and his men, carried to Earls Island, and drowned in Lough Mask with a stone fastened to his neck.