Family name Filonjuk (Filonjuk 
, Филонюк 
) , across the world, is a rare last name. The family name Filonjuk is characteristic of Eastern Europe, particularly Belarus, where it is quite a rare surname, Russia, where it is a very rare surname, and Ukraine.
| VARIANT | COUNTRY |
|---|---|
| Filonjuk | Australia |
| Филонюк | Russia, Ukraine, Belarus |