Family name Ouldouz (Улдуз 
, Ouldouz 
) , across the world, is an extremely rare surname. The cognomen Ouldouz is habitual in Kyrgyzstan, where it is a very rare surname, Canada, where it is an extremely rare surname, and Ukraine. Much more prevalently, Ouldouz is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Улдуз | Kyrgyzstan, Kazakhstan, Russia, Ukraine |
| Ouldouz | Canada |