Bertram de Verdun was the name of several members of the Norman family of de Verdun, native to the Avranchin. According to the historian Mark Hagger, the de Verdun family lived originally in Normandy where they held land, and after the Norman conquest of England they were granted land in England. Members of the family appear in original records in Normandy from at least c.1068-1085 when the first Bertram de Verdun attests a charter of Guillaume fitz-Guimond of Avranches, who makes a donation to the Abbey of Mont-Saint-Michel.