Surname Кароян (Кароян 
, Karoyan 
, Karoian 
) , across the world, is quite a rare cognomen. The surname Кароян is characteristic of Georgia, where it is quite a rare surname, Armenia, where it is a rare surname, and Russia. Measured by absolute frequency, the name is most common in Russia, Georgia, and Ukraine. Likewise, Кароян is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Кароян | Kazakhstan, Ukraine, Belarus, Armenia, Russia |
| Karoyan | Germany, France, United States, Armenia, Russia |
| Karoian | Georgia |