John (who had livery in 1167-8, and d. 6 Nov 1183), by Alice, sister of Ralph Murdac. John was son and heir of Walter son and heir of Ralph (who m. Basilie), son and heir of Walter d'Aincurt, the Domesday lord of Blankney. [Complete Peerage IV:118 note (c)]
------------------------------------
John Deincourt, 4th baron, who, in the 22nd Henry II [1176], paid 20 marks in Nottinghamshire for trespassing the king's forests and 10 marks in Northamptonshire for a similar transgression. This John m. Ann, dau. of Ralph Murdac, and was s. by his son, Oliver. [Sir Bernard Burke, Dormant, Abeyant, Forfeited and Extinct Peerages, Burke's Peerage, Ltd., London, England, 1883, p. 170, d'Eyncourt, Barons d'Eyncourt]