Family name Пепоян (Пепоян 
, Pepojan, Pepoyan 
) , in the world, is a very rare cognomen. The surname Пепоян is habitual in Eastern Europe, particularly Belarus, where it is a rare surname, Russia, where it is a very rare surname, and Ukraine. Likewise, Пепоян is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Пепоян | Belarus, Ukraine, Russia, Armenia |
| Pepoyan | Russia, United States |