Cognomen Vuiko (Vuiko 
, Вуйко 
) , all over the world, is a rare last name. The last name Vuiko is characteristic of Ukraine, where it is a rare surname, Kazakhstan, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Vuiko | Russia, United States, Ukraine |
| Вуйко | Kyrgyzstan, Russia, Kazakhstan, Ukraine |