In the entire world, Hajdú (Hajdu 
, Haiduc 
, Hajdú 
) is a rare epicene first name. The forename Hajdú is habitual in Hungary, where it is quite a rare epicene name, Romania, where it is a rare epicene name, and China, where it is an extremely rare male name. Much more frequently, Hajdú is the last name as well as the forename.