Cognomen Polonskaja (Полонская 
, Polonskaja 
) , in the world, is quite a rare family name. The last name Polonskaja is characteristic of Belarus, where it is quite a rare surname, Russia, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Полонская | Kazakhstan, Russia, Kyrgyzstan, Belarus, Armenia |
| Polonskaja | Lithuania, Estonia, Germany |