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Family name Werth (Werth , 沃斯 , Верт ) , in the world, is a common last name. The last name Werth is habitual in Germany, where it is quite a rare surname, Barbados, and Austria. Not in comparison with a country's population, it is commonest in Germany, the United States, and France. Much less frequently, Werth is the forename as well as the last name.