Research Notes:
Adam de Poynings, son of Adam de Poynings and his wife Beatrix, was a "benef: to St. Pancras; att. to Earl de Warren, 1194." [1]
Complete Peerage states, [2]
Adam de Poynings the younger … confirmed to Lewes Priory the 12 solidates of land and the messuages mentioned above at a date not earlier than 1164;(b) and circa 1180 he exchanged with the priory the church of Pyecombe for that of Poynings.(c) He gave to the same house, for the soul of Beatrice his mother, tithe of his cheeses in Poynings and Pangdean;(d) and he frequently occurs as a witness in charters issued thereto in 1147 and the ensuing period.(e) In 1194 he occurs as attorney for Hamelin, Earl de Warenne;(f) he was living in Easter term 1198,(g) and d. before Mich. 1202.
(b) Chartulary, pt. 2, p. 60. The grantor is described as Adam son of Adam de Punyngis, and the first witness is Hamelin, Earl de Warenne.
(c) Idem, pt. 2, p. 55, and Anc. Deed A 14202, there quoted, being a charter of Seffrid II, Bishop of Chichester, "in the first year of his consecration," i.e. 1180-81, recognising the exchange.
(d) Chartulary, pt. 2, p. 125, witnessed, among others, by Hamelin, Earl de Warenne; this charter was evidently issued on the same occasion as that in note "b" above.
(e) P.R.O. Anc. Deed AA 463, issued in 1147 (Idem, pt. 2, p. xxiii); British Museum Facsimiles, no. 25, issued on the same occasion; and several other charters in the Lewes Chartulary, e.g. pt. i, p. 56, not earlier than 1178; pt. I, p. 64, circa Jan. 1190/1 (cf. Yorks Arch. Journal, vol. x.xxi, p. 295 n.). He had a yr. s. Hamelin, who was given certain churches in Lewes by the priory (Chartulary, pt. 2, p. 26).
(f) Rot. Cur. Regis, vol. i, p. 72.
(g) Curia Regis Rolls, vol. i, pp. 35, 41. It is possible that these later references are to a younger Adam, but of this there is no corroborative evidence.
[1] Thomas Agar Holland, "Poynings," Sussex Archaeological Collections 15 (1863), 1-56 at 14, [GoogleBooks].
[2] George E. Cokayne, H. A. Doubleday, Howard de Walden, eds., The Complete Peerage, rev., Vol. 10, Oakham to Richmond (London: St. Catherine Press, 1945), 657.