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Family name Клемм (Klemm , Clemm , Клемм ) , across the world, is a common surname. The family name Клемм is habitual in Germany, where it is quite a common surname, Hungary, where it is quite a rare surname, and Estonia. Measured by absolute frequency, it is the most numerous in Germany, the United States, and Hungary. Very seldom, Клемм is the forename as well as the last name.