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Surname Bujak (Bujak , Буяк , Бужак ) , across the world, is quite a common cognomen. The surname Bujak is characteristic of Bosnia and Herzegovina, where it is quite a common surname, Poland, and Montenegro, where it is quite a rare surname. Measured by absolute frequency, it most frequently occurs in Poland, Ukraine, and the United States. Also, Bujak is the forename as well as the last name.