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Surname Kreis (كريس , Kreis , Крайс ) , throughout the world, is a common cognomen. The cognomen Kreis is characteristic of Switzerland, where it is quite a common surname, Germany, where it is quite a rare surname, and Estonia. Not in comparison with a country's population, it most frequently occurs in Germany, Sudan, and the United States. Much less frequently, Kreis is the forename as well as the last name.