WILLIAM (-24 Dec 1193, bur Wymondham Priory). Robert of Torigny names "Guillermum primogenitum suum et Godefridum et…comitissam uxorem Johannis comitis Aucensis" as children of "Willermi de Albinaio quem vocant comitem de Arundel" & his wife[17]. He succeeded his father in 1176, generally known as Earl of Sussex as the castle of Arundel was retained by the crown on his father's death. They were restored to Earl William in 27 Jun 1190, after which he was referred to as Earl of Arundel[18]. The Annals of Waverley record the death "in vigilia Natalis Domini" in 1193 of "Willelmus comes junior de Arundel"[19]. m (after 1173) as her second husband, MATILDA de Saint-Hilaire, widow of ROGER de Clare Earl of Hertford, daughter and heiress of JAMES de Saint-Hilaire & his wife Aveline ---. Robert of Torigny records that "Willermus de Albineio…comitem d'Arundel…[filium] Guillermum de Albineio primogenito" and "relictam Rogerii comitis de Clara filiam Jacobi de Sancto Hilario"[20]. Her name is confirmed by the undated charter which records that "Wilielmus comes Sussexiæ" confirmed donations to Boxgrove Priory by his predecessors "Rogerus de Albineio, et Willelmus Pincerna…et Willielmi patris mei filii reginæ Aeliz, et Matildis matris meæ"[21]. Earl William & his wife had [two] children