Cognomen Dubnitskaya (Dubnitskaya 
, Дубнитская , Дубницкая 
) , in the entire world, is a rare family name. The last name Dubnitskaya is characteristic of Russia, where it is a rare surname, Belarus, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Dubnitskaya | Russia, United States |
| Дубнитская | Russia |
| Дубницкая | Kazakhstan, Russia, Ukraine, Belarus |