Cognomen Mateichuk (Mateichuk 
, Матейчук 
) , worldwide, is quite a rare surname. The surname Mateichuk is characteristic of Eastern Europe, particularly Ukraine, where it is quite a rare surname, Belarus, where it is a rare surname, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Mateichuk | Argentina, Russia, Ukraine |
| Матейчук | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |