In the world, Ostan (Osten 
, Ostan 
, Остан 
) is a rare principally boy's, but very seldom female first name. The first name Ostan is characteristic of Uzbekistan, where it is a rare boy's name, Tanzania, and Greece. Measured by absolute frequency, it most frequently occurs in Indonesia, India, and Uzbekistan. More prevalently, Ostan is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Osten | Germany, Philippines, Brazil, United States, Zimbabwe |
| Ostan | Philippines, Italy, Brazil, United States, Turkey |
| Остан | Ukraine, Uzbekistan, Russia, Armenia, Kyrgyzstan |