Cognomen Doikova (Doikova 
, Дойкова 
) , all around the world, is a rare surname. The surname Doikova is characteristic of Bulgaria, where it is quite a rare surname, Ireland, where it is a rare surname, and Ukraine. Measured by absolute frequency, it most frequently occurs in Eastern Europe, particularly Bulgaria, Russia, and Ukraine.
| VARIANT | COUNTRY |
|---|---|
| Doikova | Bulgaria, Russia, Ireland |
| Дойкова | Bulgaria, Kazakhstan, Ukraine, Russia |