Cognomen Efimenkova (Efimenkova 
, Ефименкова 
) , globally, is a rare surname. The last name Efimenkova is characteristic of Russia, where it is a rare surname, Belarus, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Efimenkova | Belarus, Russia |
| Ефименкова | Belarus, Russia, Kazakhstan, Ukraine |