This shows confusion I think. Robert Fitzhugh, a bastard son of Hugh Lupus, Earl of Chester, hold the Barony of Malpas at doomsday 1088 and is a witness to the foundation of `St Werbergh's", now Chester cathedral. Bastards are mostly recognised. Robert does not get Chester ( Malpas instead) and Hugh Lupus' only legitimate son dies on `the White Ship.
Robert has two daughters, Leticia and Mabella and passes the manor on in split shares called moeities which is legally documented. Mabella marries William Le Belward. Leticia marries into the Patric family.