Cognomen Ousaini (Ousaini 
) , throughout the world, is a very rare last name. The last name Ousaini is characteristic of Libya, where it is a rare surname, and Nigeria, where it is an extremely rare surname. Much less frequently, Ousaini is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ousaini | Libya, Nigeria |