Cognomen Петоиан (Петоиан 
, Petoian 
) , around the globe, is a very rare family name. The family name Петоиан is habitual in Georgia, where it is a rare surname, Russia, where it is a very rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Петоиан | Russia |
| Petoian | Georgia, United States |