He [John Giffard] was affianced, at the age of 4 years, to Aubrey DE CAUMVILLE (who was about the same age), but he did not marry her (b). [Complete Peerage V:639-44, (transcribed by Dave Utzinger)]
(b) So the proof of age mentioned above. She was probably the Aubrey de Canville, a nun of Polesworth, who was elected Abbess in Dec 1276 or in the following month. The marriage was contracted at Arrow, co. Warwick, and she must have been a daughter of Thomas de Camville, of Arrow, and a descendant of Aubrey Marmion, Lady of Arrow, wife of William de Caumville.