Herluin de Conteville (c. 1001–1066) was the stepfather of William the Conqueror and the father of Odo of Bayeux and Robert, Count of Mortain, both of whom became prominent during William's reign. He died in 1066, the year his stepson conquered England.
Herleva (c. 1005 – c. 1050) was an 11th-century Norman woman known for having been the mother of William the Conqueror, born to an extramarital relationship with Robert I, Duke of Normandy, and also of William's prominent half-brothers Odo of Bayeux and Robert, Count of Mortain, born to Herleva's marriage to Herluin de Conteville.