Family name Koroša (Koroša 
) , throughout the world, is a very rare surname. The last name Koroša is habitual in Southern Europe, particularly Slovenia, where it is a rare surname, and Croatia.
| VARIANT | COUNTRY |
|---|---|
| Koroša | Croatia, Slovenia |
| aleksander koroša researcher |
|
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| ana koroša SI |
|
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| anja koroša SI |
|