Family name 信三 (Shinzo 
, 信三 , Shinzō 
) , across the world, is a rare last name. The cognomen 信三 is characteristic of Japan, where it is a rare surname, Myanmar, where it is a very rare surname, and Malaysia, where it is an extremely rare surname. Not in comparison with a country's population, it is commonest in Japan, China, and Myanmar. Also, 信三 is the forename as well as the last name.