Cognomen Ontse (Ontse 
) , around the globe, is a very rare family name. The last name Ontse is characteristic of Botswana, where it is quite a rare surname, and Spain, where it is an extremely rare surname. Much less frequently, Ontse is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ontse | Botswana, Spain, South Africa |