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Surname קלר (Keller , Cläre , Köhler ) , worldwide, is a widespread cognomen. The last name קלר is characteristic of Western Europe, particularly Switzerland, where it is a common surname, Germany, and Liechtenstein (explore the name in all countries). Measured by absolute frequency, it most frequently occurs in Germany, the United States, and Switzerland. Very seldom, קלר is the forename as well as the last name.