In the Domesday Book William fitz Ralf held 2-1/2 hides in Lutton and in Castor, Northants., of the Abbot of Petersborough and he also held a fee in Massingham and Butterwick, Co. Lincs. His successor appears to have been his son, Ralf fitz William, who held in the time of Henry I (V.C.H. Northants., vol. I, pp. 315b, 387b; II, p. 584; Bridges Northamptonshire, vol. II, pp. 402, 500) and these passed to John, son of William de Douvres, who mortgaged Lutton to Aaron of Lincoln, the Jew, for 50 marks, which on his death became payable to the King (Pipe R. Northants., 3 rich. I, 1191/2).175

Henry of Pytchley, the monk of Peterborough, records that William fitz Ralf was the first feoffee of Lutton and that thereafter a certain Fulbert de Douvres held it and that the heirs of Fulbert held 4 hides in Luddington and Castor and 1-1/2 virgates in Lincs. and 4 carucates in Massingham in that county by service of 3 knights' fees (Henry of Pytchley's Book of Fees, Northants., Rec. Soc., pp. 46, 49n).175