4 William de Gareme (Garenne, Warrenne) took his name from a small river in the old county of Calais or Caux in Normandy, where on the west side of the river stood the ancient baronial seat of the de Warrennes some of the ruins of which were still standing in 1832.54072

Pg 112, Warenne is derived from the hamlet of Varenne (sic) on the little river Varenne in Normandy.17595

Pg 141 Warren: 4. William De Warren, Earl of Warren, in Normandy55286

Pg 112, 32. Rodulf de Warenne, whose parentage is unknown, held land outside the walls of Rouen under Robert I, Duke of Normandy Marr: Beatrice, neice(sic) of Gunnor, wife of Richard I the Fearless, Duke of Normandy (Normandy 35) and had: 31. William de Warenne17595 (father of William is William or Rodulf?)