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Cognomen Ergun (Ergun , Ергун , Эргюн ) , worldwide, is quite a common family name. The last name Ergun is habitual in Western Asia, particularly Turkey, where it is quite a rare surname, Cyprus, and Azerbaijan. Not in comparison with a country's population, it is commonest in Turkey, France, and Germany. Also, Ergun is the forename as well as the last name.