Family name Kalaydzhian (Kalaydzhian 
, Калаыджян 
) , in the world, is a very rare surname. The surname Kalaydzhian is habitual in Eastern Europe, particularly Bulgaria, where it is a rare surname, and Russia, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kalaydzhian | Bulgaria |
| Калаыджян | Russia |