Last name Кошлиак (Кошлиак 
, Koshliak 
) , around the world, is a very rare surname. The family name Кошлиак is characteristic of Russia, where it is a very rare surname, Ukraine, where it is an extremely rare surname, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Кошлиак | Russia |
| Koshliak | United States, Ukraine |