Cognomen Prokopiouk (Прокопюк 
, Prokopiouk 
) , around the world, is quite a rare family name. The last name Prokopiouk is characteristic of Ukraine, where it is quite a rare surname, Belarus, and Kazakhstan, where it is a rare surname. Measured by absolute frequency, it is the most numerous in Eastern Europe, particularly Ukraine, Russia, and Belarus.
| VARIANT | COUNTRY |
|---|---|
| Прокопюк | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| Prokopiouk | Brazil |