All around the world, Гюндюз (Gündüz 
, Гюндюз 
, Giundiuz 
) is quite a common unisex forename. The given name Гюндюз is characteristic of Western Asia, particularly Turkey, where it is quite a rare epicene name, and Azerbaijan, where it is quite a rare masculine name. Much more prevalently, Гюндюз is the last name as well as the forename.