Cognomen Kovaltšuk (Kovaltšuk 
) , in the entire world, is an extremely rare family name. The cognomen Kovaltšuk is characteristic of Northern Europe, particularly Estonia, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kovaltšuk | Estonia |
Kovalchuk, Kovaltsuk, and Kowaltschuk
|
aleksei kovaltšuk Estonian mountaineer, EE (b. 1957) |
|