Cognomen Poluiko (Полуйко 
, Poluiko 
) , all over the world, is a rare surname. The last name Poluiko is habitual in Eastern Europe, particularly Belarus, where it is a rare surname, Ukraine, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Полуйко | Kazakhstan, Ukraine, Belarus, Russia |
| Poluiko | Ukraine, Russia, Georgia |