Hij is getrouwd met Mabel de la Mare.
Zij zijn getrouwd in het jaar 1198.
Gebeurtenis (Alt. Marriage) voor 1226: Alt. Marriage.Bronnen 2, 3
Geoffrey (IV) de Neville; Keeper of Pickering Forest in Reign of King John; married by 1226 Mabel (died by 1253), daughter and heir of William de la Mare, and died just before 13 July 1249. [Burke's Peerage]
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(f) Geoffrey de Neville, younger son of Geoffrey the Chamberlain, had charge of Pickering Forest temp. John. He m. by 1226, Mabel, daughter and heir of William de la Mare, by Mabel, elder daughter and coheir of John Malherbe, by Maud his wife, who was widow of Adam de Montbegon (d. 1189) and daughter and coheir of Adam (d. 1159), son of Swain, son of Albric, 1086. This marriage brought him 1/2 of Appleby, Lincs, and of the other property divided between the two daughters of John Malherbe, viz. Mabel (m. de la Mare) and Clemence (m. Lungvillers). Geoffrey d. shortly before 31 Jul 1249, and was survived by his wife, who was dead in 1253. [Complete Peerage IX:502c note (f)]