Family name Usmanjan (Усманжан 
, Usmanjan 
) , in the world, is a rare surname. The cognomen Usmanjan is habitual in Central Asia, particularly Kyrgyzstan, where it is quite a rare surname. More prevalently, Usmanjan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Усманжан | Kazakhstan, Kyrgyzstan, Uzbekistan, Russia, Azerbaijan |
| Usmanjan | India |