William fitzWimund was a Norman landholder in England after the Norman Conquest.
FitzWimund was from Avranches in Normandy, where he held land. In Domesday Book fitzWimund is recorded as holding land in Exeter as a tenant of Baldwin fitzGilbert.[1]
FitzWimund married a daughter of his overlord, Baldwin FitzGilbert. She may possibly have been named Matilda, as she is given that name on a document dated in 1066 but that must date later than that, as the text of the document refers to Michael, Bishop of Avranches, who was bishop from 1069 to 1084.[1]
FitzWimund donated to abbey at Mont-Saint-Michel.[1]
FitzWimund probably died before 1130. His son, Robert d'Avranches, married Hadvise, daughter of Gelduin of Dol.[1][2] A daughter married William Paynel, but her name is not known.[3]