Family name Poznanskiy (Poznanskiy 
, Познанский 
) , in the world, is a rare last name. The family name Poznanskiy is habitual in Belarus, where it is a rare surname, Russia, and Kazakhstan, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Poznanskiy | United States, Ukraine |
| Познанский | Kazakhstan, Belarus, Kyrgyzstan, Russia, Ukraine |