Cognomen Drevetniak (Древетняк 
, Drevetniak 
) , all over the world, is a rare surname. The surname Drevetniak is characteristic of Ukraine, where it is a rare surname, Kazakhstan, where it is a very rare surname, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Древетняк | Russia, Kazakhstan, Ukraine |
| Drevetniak | United States |