Roger Fitz-Richard who was feudal Baron of Warkworth, co. Northumberland, a lordship granted to him by King Henry II, m. Alianor, dau. and co-heir of Henry of Essex, Baron of Raleigh, and was s. by his only son, Robert Fitz-Roger. [Sir Bernard Burke, Dormant, Abeyant, Forfeited, and Extinct Peerages, Burke's Peerage, Ltd., London, 1883, p. 121, Clavering, Barons Clavering]