Note: ref: Wikipedia (http://www. wikipedia.org) (16 May 10) -
Rudolf II de Warenne, son of Rudolf I of Warenne, was a Norman aristocrat and progenitor of the Earl of Surrey family line.
He is known only from his subscriptions to two charters of his father for the Holy Trinity of Rouen. As his father's lands near Rouen and in the Pays de Caux did not pass to his son William or William's descendants, it is likely that Rodulf succeeded to them on his father's death.
The de Warenne family originated from Normandy, France. The de Warenne surname derives from the castle of that name on the Varenne River, which flows through the territory William acquired in Upper Normandy.
He married Emma in or before 1059 - both were still living in 1074, and had several children including;
? Rudolf III de Warenne - who inherited most of the family lands in Normandy.
? William de Warenne, 1st Earl of Surrey - who fought with William the Conqueror at the Battle of Hastings and was rewarded with vast land holdings as the Earl of Surrey.
? possibly Frederick de Warenne - who was killed by Hereward the Wake. He is listed in the Domesday book holding lands in Cambridgeshire and Norfolk. (Domesday, ff.196, ii.465b, 170b, 172b). Another source lists Frederick as the brother of William's wife, Gundred.