Last name Галустиан (Galustian 
, Galustyan 
, Galoustian 
) , worldwide, is a rare cognomen. The family name Галустиан is characteristic of Western Asia, particularly Georgia, where it is quite a rare surname, Cyprus, and Armenia. In absolute terms, it is commonest in Russia, Georgia, and the United States. Much less frequently, Галустиан is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Galustian | Greece, Georgia, United States, Russia, France |
| Galustyan | Greece, Czechia, United States, Russia, Armenia |
| Galoustian | Canada, United States, Australia, France |
| Галустиан | Russia |