This name comes from an English surname which in turn derives from the Norman-French "Warenne" (village of "La Varrene" in the departement of Seine-Maritime). The word “warrene”, meaning "animal enclosure (a warren or land set aside for breeding game)." The surname Warren, and after the given name, was Introduced into England and Scotland after the Conquest of 1066. William de Warenne († 1088), was a Norman nobleman who was created Earl of Surrey under William II 'Rufus'. He was one of the few who was documented to have been with William the Conqueror at the Battle of Hastings in 1066. According to United States Social Security card applications in 1920, the name Warren ranked 39th out of the top 100 names chosen by parents for their baby boys.