Cognomen Сэу (Sehu 
, Seu 
, Seou 
) , all over the world, is quite a common surname. The surname Сэу is characteristic of Moldova, where it is quite a rare surname, Ivory Coast, and South Korea. In absolute terms, it is commonest in Nigeria, South Korea, and Italy. Also, Сэу is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sehu | Indonesia, Malaysia, Nigeria, United States, India |
| Seu | Indonesia, Italy, Ivory Coast, South Korea, Nigeria |
| Seou | South Korea, Malaysia, United States, France, Democratic Republic of the Congo |
| Сэу | Kazakhstan, Russia |