Family name Билбулян (Билбулян 
, Bilbulyan 
, Bilboulian 
) , in the world, is a very rare last name. The family name Билбулян is habitual in Armenia, where it is a rare surname, Russia, where it is a very rare surname, and Chile. In absolute terms, it is the most numerous in Russia, the United States, and Armenia. More frequently, Билбулян is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Билбулян | Armenia, Russia |
| Bilbulyan | United States, Russia, Armenia, Chile |
| Bilboulian | France |