Cognomen אטו (Ato 
, Eto'O 
, Etou 
) , across the world, is a widespread surname. The cognomen אטו is habitual in Sub-Saharan Africa, particularly Ethiopia, where it is a common surname, the Democratic Republic of the Congo, where it is quite a common surname, and Cameroon. In absolute terms, the name is most common in Ethiopia, the Democratic Republic of the Congo, and Indonesia. Much less frequently, אטו is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ato | Philippines, Cameroon, Ghana, Indonesia, Ethiopia |
| Eto'O | France, Egypt, Cameroon, Nigeria, Algeria |
| Etou | Togo, France, Cameroon, Democratic Republic of the Congo, China |
| אטו | Israel |