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Surname Aygün (Aygün , Айгюн ) , in the world, is a common cognomen. The last name Aygün is characteristic of Western Asia, particularly Turkey, where it is quite a common surname, Azerbaijan, where it is quite a rare surname, and Cyprus. Not in comparison with a country's population, it most frequently occurs in Turkey, Germany, and Azerbaijan. Much less frequently, Aygün is the forename as well as the last name.