Last name Rasonja (Rasonja 
) , in all the world, is a rare surname. The cognomen Rasonja is habitual in Croatia, where it is quite a rare surname, and Germany, where it is an extremely rare surname. Very seldom, Rasonja is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rasonja | United States, Germany, Croatia |