Cognomen Dolbnya (Долбня 
, Dolbnya 
) , in all the world, is quite a rare family name. The surname Dolbnya is habitual in Kazakhstan, where it is quite a rare surname, Kyrgyzstan, and Russia. In absolute terms, the name is most common in Russia, Ukraine, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Долбня | Kyrgyzstan, Kazakhstan, Russia, Ukraine |
| Dolbnya | Kazakhstan, Russia, Belarus, United States, Ukraine |
| igor p dolbnya researcher (ORCID 0000-0003-2635-5750) |
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