Cognomen Tarnavskaia (Тарнавская 
, Tarnavskaia 
) , in the entire world, is a rare family name. The family name Tarnavskaia is characteristic of Russia, where it is a rare surname, Belarus, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Тарнавская | Kazakhstan, Belarus, Kyrgyzstan, Russia, Ukraine |
| Tarnavskaia | Georgia |