General Notes

(c) This John had livery of his lands, 19 Sep 1246, and was son and heir of Oliver (who had livery in 1217), by Nichole, to whom Nichole (1st daughter and coheir of Richard de la Haye, and wife of Gerard de Caunville) gave Duddington in free marriage; which Oliver was son and heir of Oliver (aged 24 in 1186, m. Amabel, and d. in or bef. 1201), son and heir of 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)]

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Oliver, 6th baron, who m. Nichola, grand-dau. of Nichola de la Haye, a lady of large possessions in Lincolnshire, by her husband, William FitzErnest, and was s. by their son, John. [Sir Bernard Burke, Dormant, Abeyant, Forfeited and Extinct Peerages, Burke's Peerage, Ltd., London, England, 1883, p. 170, d'Eyncourt, Barons d'Eyncourt]