Family name Sudou (スドウ 
, Sudou 
, سودو 
) , all around the world, is a rare surname. The cognomen Sudou is characteristic of Japan, where it is a rare surname, Russia, where it is a very rare surname, and Brazil, where it is an extremely rare surname. In absolute terms, it is commonest in Japan, Russia, and China. Much more frequently, Sudou is the forename as well as the last name.