Family name Билбия (Bilbija 
, Билбия 
) , globally, is quite a rare surname. The family name Билбия is habitual in Southern Europe, particularly Bosnia and Herzegovina, where it is quite a common surname, Serbia, and Slovenia, where it is quite a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Bilbija | Serbia, Croatia, Bosnia and Herzegovina, Canada, Slovenia |
| Билбия | Russia |