Cognomen Dembskii (Dembskii 
, Дембский 
) , in all the world, is a very rare last name. The cognomen Dembskii is characteristic of Russia, where it is a very rare surname, Kazakhstan, and Ukraine, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Dembskii | Russia |
| Дембский | Kazakhstan, Russia, Ukraine |