Across the world, Kornijchuk (Kornijchuk 
, Корнийчук 
) is an extremely rare unknown gender given name. Much more prevalently, Kornijchuk is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Kornijchuk | Canada, Ukraine |
| Корнийчук | Belarus, Russia, Kazakhstan, Ukraine |