Last name Мусаелиан (Musaelyan 
, Мусаелиан , Mousaelian 
) , in all the world, is a rare family name. The surname Мусаелиан is habitual in Armenia, where it is quite a rare surname, Slovakia, where it is a rare surname, and Estonia. In absolute terms, it is commonest in Russia, Armenia, and the United States. Very seldom, Мусаелиан is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Musaelyan | Armenia, Slovakia, Russia, United States, Spain |
| Мусаелиан | Russia |
| Mousaelian | New Zealand, United States |
| Musaelian | Russia, Israel, Canada, United States |