Family name Коршиа (Korshia 
, Коршиа 
) , in all the world, is a rare cognomen. The family name Коршиа is habitual in Georgia, where it is quite a rare surname, Bulgaria, where it is a rare surname, and Russia, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Korshia | Turkey, United States, Georgia, Bulgaria |
| Коршиа | Russia, Ukraine |