Cognomen Stavniychuk (Ставнийчук 
, Stavniychuk 
) , in all the world, is a very rare last name. The surname Stavniychuk is habitual in Kazakhstan, where it is a very rare surname, Ukraine, and Russia. Much less frequently, Stavniychuk is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ставнийчук | Kazakhstan, Russia, Ukraine |
| Stavniychuk | United States, Spain, Ukraine |