Ralph m. Berta, dau. of the Baron Furnival, and had a dau., Isabel, who m. 1st, Gilbert, son of Walter de Lacy, Lord of Meath, in Ireland; and 2ndly, John Fitz Geoffrey. [Sir Bernard Burke, Dormant, Abeyant, Forfeited, and Extinct Peerages, Burke's Peerage, Ltd., London, 1883, p. 53, Bigod, Earls of Norfolk]