Cognomen Dolzhykov (Должиков 
, Dolzhykov 
) , all over the world, is quite a rare family name. The surname Dolzhykov is characteristic of Russia, where it is quite a rare surname, Ukraine, and Kazakhstan, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Должиков | Kazakhstan, Belarus, Kyrgyzstan, Russia, Ukraine |
| Dolzhykov | Canada, United States, Ukraine |