Family name Čorňák (Čorňák 
) , in all the world, is a very rare surname. The cognomen Čorňák is characteristic of Eastern Europe, particularly Czechia, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Čorňák | Czechia |
| andrej čorňák SK (b. 1920) |
|
|
| štefan čorňák (b. 1960) |
|