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Last name Tyun (Tyun , Тюн , Тюнь ) , all around the world, is a rare family name. The surname Tyun is characteristic of Armenia, where it is quite a common surname, Ukraine, where it is a rare surname, and Malaysia. Measured by absolute frequency, it is the most numerous in Armenia, Russia, and Ukraine. Very seldom, Tyun is the forename as well as the last name.