Throughout the world, Sopelniak (Sopelniak, Сопелняк 
, Сопельняк 
) is an extremely rare unknown gender forename. Predominantly, Sopelniak is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Сопелняк | Russia |
| Сопельняк | Kazakhstan, Belarus, Kyrgyzstan, Russia, Ukraine |