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Surname Doyun (Doyun , 도윤 , Доюн ) , around the world, is a rare family name. The surname Doyun is characteristic of Ukraine, where it is a rare surname, Kazakhstan, where it is a very rare surname, and Russia. In absolute terms, this name is the most popular in Ukraine, Russia, and Nigeria. Predominantly, Doyun is the forename as well as the last name.