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Cognomen Leis (Leis , Лейс , Леис ) , globally, is a common surname. The surname Leis is characteristic of Estonia, where it is quite a common surname, Germany, where it is quite a rare surname, and Uruguay. Not in comparison with a country's population, it most frequently occurs in Germany, the United States, and Argentina. Very seldom, Leis is the forename as well as the last name.