Cognomen Кийаджан (Кийаджан 
) , in all the world, is an extremely rare family name. The last name Кийаджан is habitual in Central Asia, particularly Kyrgyzstan, where it is a very rare surname. More prevalently, Кийаджан is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Кийаджан | Kyrgyzstan |