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Surname Berth (Berth , 伯思 , Beart ) , throughout the world, is quite a rare last name. The surname Berth is characteristic of Belgium, where it is quite a rare surname, Denmark, and France, where it is a rare surname. Measured by absolute frequency, the name is most common in Western Europe, particularly Germany, France, and Belgium. Also, Berth is the forename as well as the last name.