Cognomen Načuk (Начук 
, Načuk 
) , across the world, is an extremely rare last name. The family name Načuk is characteristic of Southern Europe, particularly Croatia, where it is a very rare surname. Much less frequently, Načuk is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Начук | Russia |
| Načuk | Croatia |