Surname Kozoulia (Козуля 
, Kozoulia 
) , in the world, is quite a rare family name. The cognomen Kozoulia is habitual in Eastern Europe, particularly Ukraine, where it is quite a rare surname, Belarus, and Russia, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Козуля | Kazakhstan, Ukraine, Belarus, Russia |
| Kozoulia | France |