Alice de Vere, daughter of Aubrey de Vere and third wife Agnes of Essex, was the heiress of the manor of Rikeling and married Geoffrey de Saye (d. 1214) as his second wife. See excerpt from Charles Cawley, below.

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Charles Cawley writes at http://fmg.ac/Projects/MedLands/ENGLISHNOBILITYMEDIEVAL3P-S.htm#_To... about
GEOFFREY [II] de Say ([1135 or before]-[1212/14]) ...

m secondly ALICE de Vere, daughter of AUBREY de Vere Earl of Oxford & his [third wife Agnes de Essex] (-after 1214). Her marriage and family origin are confirmed by a charter dated to [10 Aug 1197/8 Mar 1198] which records the confirmation by "Geoffrey de Say, son of Geoffrey, son of William de Say" of a grant of "the manor of Rikeling" made by "his said father to Geoffrey de Say, his own younger brother, whom his father had by Alice de Ver" on the petition of "William de Say his eldest brother"[1020].

Geoffrey [II] & his second wife had one child: iii) GEOFFREY [IV] de Say . A charter dated to [10 Aug 1197/8 Mar 1198] records the confirmation by "Geoffrey de Say, son of Geoffrey, son of William de Say" of a grant of "the manor of Rikeling" made by "his said father to Geoffrey de Say, his own younger brother, whom his father had by Alice de Ver" on the petition of "William de Say his eldest brother"[1026]. “Galfridus de Say, filius Galfridi de Say et Aliciæ de Ver, dominus de Rikelyng” donated property to Waldon abbey by undated charter, witnessed by “domino Willielmo de Mandevilla comite Essexiæ…”[1027]. m ---. The name of Geoffrey´s wife is not known. Geoffrey [IV] & his wife had one child: (a) MATILDA de Crec (-after 1278). Her parentage is recorded in the Complete Peerage which states that in 1278 she held land in Nosterfield, Cambridgeshire from the Honor of Richmond, land which her paternal grandmother had held before[1028].