Daughter of William Poncius, Count of Arques and Thoulousse, son of Richard II, Duke of Normandy; she was cousin to William the Conqueror and sister to Richard FitzPontz who married the heiress of Clifford Castle and founded the baronial family of de Clifford. [John Burke, History of the Commoners of Great Britain and Ireland, Vol. IV, R. Bentley, London, 1834, p. 757, Stansfeld, of Burley Park]