Surname Sopelnyak (Sopelnyak 
, Сопелняк , Сопельняк 
) , around the world, is a rare last name. The family name Sopelnyak is habitual in Eastern Europe, particularly Russia, where it is a rare surname, Ukraine, and Belarus.
| VARIANT | COUNTRY |
|---|---|
| Sopelnyak | Russia, Ukraine |
| Сопелняк | Russia |
| Сопельняк | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |