Cognomen Кайнарь (Kainar 
, Кайнарь 
) , in the world, is a rare family name. The family name Кайнарь is characteristic of Bosnia and Herzegovina, where it is quite a rare surname, Slovakia, where it is a rare surname, and Czechia. Measured by absolute frequency, it is commonest in Bosnia and Herzegovina, Indonesia, and Germany. Also, Кайнарь is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kainar | Germany, Kazakhstan, Indonesia, Bosnia and Herzegovina, Slovakia |
| Кайнарь | Russia |