Last name Tetuo (テツオ 
, Tetuo 
) , in the world, is a common surname. The surname Tetuo is characteristic of Eastern Asia, particularly Japan, where it is quite a common surname, and Taiwan, where it is a rare surname. Much less frequently, Tetuo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| テツオ | Japan |
| Tetuo | Taiwan, Brazil |