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Surname 鲁思 (Rooth , 鲁思 ) , all around the world, is quite a rare last name. The family name 鲁思 is characteristic of Sweden, where it is quite a rare surname, Norway, and Netherlands. Measured by absolute frequency, it is commonest in Sweden, the United States, and Netherlands. Also, 鲁思 is the forename as well as the last name.