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Surname Хайдук (Hajduk , Haiduk , Khaiduk ) , across the world, is a common last name. The last name Хайдук is characteristic of Slovakia, where it is quite a common surname, Poland, and Croatia. Measured by absolute frequency, it is commonest in Poland, the United States, and Germany. Also, Хайдук is the forename as well as the last name.