Cognomen Milonja (Milonja 
) , throughout the world, is a very rare last name. The cognomen Milonja is habitual in Greece, where it is a rare surname, Croatia, and Canada, where it is a very rare surname. Much less frequently, Milonja is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Milonja | United States, Croatia, Canada, Greece |