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 | Malaysia, India, Nigeria, Indonesia, United States |
| Seu | Ivory Coast, South Korea, Italy, Nigeria, Indonesia |
| Seou | South Korea, Malaysia, France, United States, Democratic Republic of the Congo |
| Сэу | Kazakhstan, Russia |