Surname Prosianiuk (Prosianiuk 
, Просянюк 
) , in all the world, is a rare last name. The surname Prosianiuk is characteristic of Ukraine, where it is a rare surname, Belarus, and Argentina, where it is a very rare surname. Measured by absolute frequency, this name is the most popular in Ukraine, Russia, and Argentina.
| VARIANT | COUNTRY |
|---|---|
| Prosianiuk | United States, Argentina |
| Просянюк | Ukraine, Russia, Belarus |