Cognomen Ktoian (Ктоян 
, Ktoian 
) , in the world, is a rare last name. The last name Ktoian is characteristic of Georgia, where it is a rare surname, Russia, and Ukraine, where it is a very rare surname. Very seldom, Ktoian is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ктоян | Armenia, Russia, Ukraine |
| Ktoian | Georgia |