Bec-de-Mortagne in the Pays de Caux is thought to be the birth-place of Turstin FitzRolf, standard bearer to William the Conqueror at the Battle of Hastings in 1066, as he was described by the 12th-century chronicler Orderic Vitalis as from "Bec-en-Caux".
In the Domesday Book of 1086 the manor of Syndercombe is recorded as held by Turstin FitzRolf.