Family name 成男 (Shigeo , 成男 ) , around the globe, is quite a common last name. The last name 成男 is characteristic of Japan, where it is quite a rare surname, Malaysia, where it is a rare surname, and Hungary. Not in comparison with a country's population, the name is most common in Japan, China, and Myanmar. Also, 成男 is the forename as well as the last name.