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, Nigeria, Malaysia, Thailand, India |
| Bunia | Somalia, Nigeria, Malaysia, Poland, India |
| Bunja | Nigeria, Malaysia, Thailand, India, Gambia |
| Буня | Belarus, Ukraine, Russia, Kazakhstan |