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Last name Гюн (Gyun , Gün , Гюн ) , in the entire world, is a common family name. The surname Гюн is habitual in Turkey, where it is quite a common surname, South Korea, where it is a rare surname, and Austria. Measured by absolute frequency, it most frequently occurs in Turkey, Germany, and South Korea. Very seldom, Гюн is the forename as well as the last name.