Maud, m. 1st to William de Burgh, Earl of Ulster, by whom she had an only dau. and heiress, Elizabeth de Burgh, m. to Lionel, Duke of Clarence; the Lady Maud m. 2ndly, Ralph de Ufford, justice of Ireland, temp. Edward III, and brother of Robert, Earl of Suffolk, by whom she had an only dau., Maud, m. to Thomas, son of John de Vere, Earl of Oxford. [Sir Bernard Burke, Dormant, Abeyant, Forfeited, and Extinct Peerages, Burke's Peerage, Ltd., London, 1883, p. 432, Plantagenet, Earls of Chester, &c.]