Cognomen Doljin (Doljin 
, Должин 
) , all around the world, is a rare last name. The surname Doljin is characteristic of Mongolia, where it is quite a rare surname, Russia, where it is a very rare surname, and Ukraine, where it is an extremely rare surname. Likewise, Doljin is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Doljin | Mongolia, United States, India, United Kingdom |
| Должин | Russia, Ukraine |