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Cognomen Tietz (Tietz , Тиц ) , all around the world, is a common last name. The cognomen Tietz is characteristic of Germany, where it is quite a common surname, Namibia, where it is quite a rare surname, and Switzerland. Not in comparison with a country's population, it most frequently occurs in Germany, the United States, and Brazil. Much less frequently, Tietz is the forename as well as the last name.