Last name Nadjak (Nadjak 
, Надяк 
) , around the globe, is a rare family name. The surname Nadjak is habitual in Togo, where it is quite a rare surname, North Macedonia, where it is a rare surname, and Ukraine.
| VARIANT | COUNTRY |
|---|---|
| Nadjak | Brazil, Togo, North Macedonia |
| Надяк | Kazakhstan, Ukraine, Russia |