This last name was originally a typical Scandinavian Patronymic: http://wiki.geni.com/index.php/Patronymics For Scandinavian families it was only introduced as a last name or family name around 1850-1900.
Balázs Déri says :
However svensk nation is called by the title of kings of ancient Kengur " en-su "known in Aigypt also as en-sawa and in hebrew also as en-sawa'a - now incorrectly pronounced Kengir,ensi,nesu and nasi'. One of the ensu of Kar-Dun-Gurra was kasshu A-Sha-yan-Na-Wa who might have released many of the inhabitants of later Sven-Rige originally speaking finnish,wakash and rather mainly komi languages.
See Eriksson,Schwed,Normann,Permyakov,Hansen,Larsen,Normann,Grúz,Türk and others !