William Donn de Burgh Irish nobleman; 3rd Earl of Ulster and 4th Baron of Connaught (1312-33) (1312–1333) Parents John de Burgh Elizabeth de Clare Children Elizabeth de Burgh, 4th Countess of Ulster Siblings Isabel de Verdun, Lady Ferrers of Groby Elizabeth d'Amorie, Baroness d'Amorie Eleanor d'Amorie Partners Maud of Lancaster, Countess of Ulster