Family name Bogunyak (Bogunyak 
, Богуняк 
) , throughout the world, is a rare surname. The cognomen Bogunyak is characteristic of Eastern Europe, particularly Ukraine, where it is a rare surname, and Russia, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Bogunyak | Russia |
| Богуняк | Ukraine, Russia |