Surname Буня (Bunya 
, Bunia 
, Bunja 
) , around the world, is quite a rare family name. The last name Буня is habitual in Croatia, where it is quite a rare surname, Hungary, where it is a rare surname, and Thailand. Measured by absolute frequency, the name is most common in Thailand, India, and Russia. More prevalently, Буня is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Bunya | Japan, India, Malaysia, Thailand, Nigeria |
| Bunia | Poland, Somalia, India, Malaysia, Nigeria |
| Bunja | Gambia, India, Malaysia, Thailand, Nigeria |
| Буня | Ukraine, Belarus, Kazakhstan, Russia |