Family name Должин (Должин 
, Dolzhin ) , in the entire world, is a very rare last name. The cognomen Должин is habitual in Eastern Europe, particularly Russia, where it is a very rare surname, and Ukraine, where it is an extremely rare surname. Very seldom, Должин is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Должин | Russia, Ukraine |
| Dolzhin | Russia |