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Surname Korth (Korth , 科斯 , 科思 ) , around the globe, is quite a common last name. The family name Korth is characteristic of Germany, where it is quite a rare surname, the United States, where it is a rare surname, and Kazakhstan. Measured by absolute frequency, this name is the most popular in Germany, the United States, and Russia. Much less frequently, Korth is the forename as well as the last name.