Sudou 【須藤】6 The Japanese surnames etymology dictionary.
Hokkaidou , Mie-ken , Nagasaki-ken . Estimated from high well well. Aichi-ken Nagoya-shi Naka-ku Honmaru was in the Edo period in the Owarii clan of the Clan office, Kumamoto-ken Kumamoto-shi Chuo-ku Honmaru in the Kumamoto samurai of the clan office.