Surname Дуанбай (Дуанбай 
) , in the entire world, is an extremely rare family name. The family name Дуанбай is characteristic of Central Asia, particularly Kazakhstan, where it is a very rare surname. Predominantly, Дуанбай is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Дуанбай | Azerbaijan, Kazakhstan |