Cognomen Khalaidzhyan (Khalaidzhyan 
, Халайджян 
) , all around the world, is a rare last name. The surname Khalaidzhyan is habitual in Eastern Europe, particularly Russia, where it is a rare surname, and Ukraine, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Khalaidzhyan | Russia |
| Халайджян | Russia, Ukraine |
Халаиджян, and Халайджьян