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Cognomen Duman (Duman , Думан , دومان ) , in the world, is a widespread surname. The last name Duman is characteristic of Turkey, where it is a common surname, Romania, where it is quite a common surname, and Yemen, where it is quite a rare surname. Measured by absolute frequency, it is commonest in Turkey, Romania, and Germany. Very seldom, Duman is the forename as well as the last name.