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Family name Koth (Koth , 科斯 , 科思 ) , all over the world, is quite a rare surname. The surname Koth is characteristic of Laos, where it is quite a rare surname, Germany, and Austria, where it is a rare surname. Not in comparison with a country's population, it most frequently occurs in the United States, Germany, and the Democratic Republic of the Congo. Very seldom, Koth is the forename as well as the last name.