Cognomen テツシ (Tetsushi 
, テツシ ) , across the world, is quite a rare family name. The surname テツシ is characteristic of Japan, where it is quite a rare surname, Singapore, where it is a rare surname, and Vietnam, where it is a very rare surname. Not in comparison with a country's population, the name is most common in Japan, China, and Vietnam. Much less frequently, テツシ is the forename as well as the last name.