Cognomen Гейдук (Hejduk 
, Heyduk 
, Гейдук 
) , across the world, is quite a rare family name. The family name Гейдук is habitual in Czechia, where it is quite a common surname, Poland, where it is quite a rare surname, and Austria, where it is a rare surname. Not in comparison with a country's population, this name is the most popular in Czechia, Poland, and the United States. Also, Гейдук is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Hejduk | Germany, Czechia, Austria, United States, Poland |
| Heyduk | Germany, Czechia, United Kingdom, United States, Poland |
| Гейдук | Ukraine, Russia |