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Cognomen Bieler (Bieler , بيلر , Билер ) , worldwide, is quite a common last name. The surname Bieler is characteristic of Western Europe, particularly Switzerland, where it is quite a common surname, Germany, where it is quite a rare surname, and Austria. In absolute terms, this name is the most popular in Germany, Switzerland, and the United States. Much less frequently, Bieler is the forename as well as the last name.