Cognomen Мусоиан (Мусоиан 
, Musoian 
, Mousoian 
) , all over the world, is a very rare last name. The cognomen Мусоиан is habitual in Georgia, where it is a very rare surname, Russia, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Мусоиан | Russia |
| Musoian | Georgia |
| Mousoian | United States |