Grosvenor is a surname derived from what member of a French Family that was also known as Hugh the French or Hugh the Wolf?
Grosvenor (surname): Grosvenor ( ) is a surname derived from Hugh Le Grand Veneur, a member of a Norman French family that aided William the Conqueror in 1066. Hugh d'Avranches, Earl of Chester: Hugh d'Avranches (  1047  – 27 July 1101), also known as Hugh the Fat (French: "Hugues le Gros" ) or Hugh the Wolf (Latin: "Hugo Lupus" ), was the second Norman earl of Chester (2nd creation) and one of the great magnates of early Norman England.
Hugh d'Avranches