Cognomen Kozmelj (Kozmelj 
) , in all the world, is a very rare last name. The last name Kozmelj is habitual in Southern Europe, particularly Slovenia, where it is quite a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kozmelj | Slovenia |
|
rajko kozmelj SI (b. 1969) |
|
| mojca kozmelj SI |
|