Last name Довбниа (Довбниа 
, Dovbnia 
, Dovbnya 
) , in the world, is a rare surname. The cognomen Довбниа is characteristic of Eastern Europe, particularly Bulgaria, where it is a rare surname, Russia, where it is a very rare surname, and Ukraine.
| VARIANT | COUNTRY |
|---|---|
| Довбниа | Russia |
| Dovbnia | Russia, Ukraine, United States |
| Dovbnya | Russia, Spain, Bulgaria, United States, Ukraine |