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Cognomen Gunaydin (Gunaydin
, Gunaydın
, Гунаыдин
) , in all the world, is quite a rare family name. The surname Gunaydin is characteristic of Turkey, where it is a rare surname, Norway, and Belgium. Not in comparison with a country's population, it most frequently occurs in Turkey, the United States, and Belgium. Very seldom, Gunaydin is the forename as well as the last name.