Surname Осан (Осан 
) , globally, is a rare family name. The last name Осан is characteristic of Moldova, where it is quite a rare surname, Kazakhstan, where it is a very rare surname, and Kyrgyzstan. In absolute terms, it is commonest in Moldova, Russia, and Kazakhstan. Likewise, Осан is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Осан | Kazakhstan, Ukraine, Moldova, Kyrgyzstan, Russia |