Cognomen Өсербай (Өсербай 
) , all around the world, is an extremely rare family name. The family name Өсербай is characteristic of Central Asia, particularly Kazakhstan, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Өсербай | Kazakhstan |
| өсербай құлбатыров KZ (b. 1913) |
|