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 | Ukraine, Russia, United States |
| Вуйко | Ukraine, Russia, Kyrgyzstan, Kazakhstan |