Cognomen Галуст (Галуст 
, Galust 
, Galoust 
) , across the world, is quite a rare surname. The last name Галуст is habitual in Armenia, where it is quite a common surname, Georgia, where it is quite a rare surname, and the United States, where it is an extremely rare surname. Likewise, Галуст is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Галуст | Kazakhstan, Ukraine, Belarus, Russia, Armenia |
| Galust | Georgia, Canada, United States, France, Armenia |
| Galoust | United States, Spain, France |