Family name Kornja (Корня 
, Kornja 
) , around the world, is quite a rare cognomen. The surname Kornja is characteristic of Ukraine, where it is quite a rare surname, Serbia, and Russia, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Корня | Kazakhstan, Ukraine, Belarus, Russia |
| Kornja | Germany, Serbia, United States, Australia |