From Douvres, in Bessin east of Bayeaux, Normande, not Dover, ENG
From History of Kent by W.H. Ireland (1829), "Fulbert de Dover's Tower was erected by Fulbert de Lucie, who accompanied the Conquerer to England. Being appointed one of the knights to defend the fortress, by John de Fiennes, he assumed the name of Dover, and on his personal services being no longer required at the castle, retired to his baronial residence of Chilham."