Cognomen Ovseitchouk (Ovseitchouk, Овсейчук 
) , in the world, is a rare surname. The surname Ovseitchouk is characteristic of Belarus, where it is a rare surname, Kazakhstan, and Ukraine. Not in comparison with a country's population, it is the most numerous in Russia, Ukraine, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Овсейчук | Kazakhstan, Russia, Ukraine, Belarus |