Rivallon de Abrincis
Rivallon of Avranches, lord of Folkestone, Kent, by marriage with Matilda de Muneville, granddaughter and heiress of William of Arques (BL Harley 4757, copy of Bermondsey register, fol.3, Henry I orders Roger sheriff of Surrey and Gilbert his nephew to ensure Bermondsey has the grants made by Nigel de Muneville 'et gener eius Rivallonus de Abrincis'). Occurs from the beginning of Henry's reign; the king had apparently given him the royal manor of Stanton Harcourt by May 1101. Occurs in charters of St Andrew, Northampton, associated with Turgis d'Avranches, of whom he was perhaps a close relative; possibly both were related to Bishop Turgis of Avranches (1091-1134). Father of William d'Avranches and Mitilda alias Felicia, wife of Humphrey de Millieres. [Domesday Descendants pp262-263]