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Surname Auer (Auer , Ауер , Ауэр ) , all over the world, is a common cognomen. The cognomen Auer is habitual in Western Europe, particularly Austria, where it is a common surname, Liechtenstein, where it is quite a common surname, and Switzerland (explore the name in all countries). Measured by absolute frequency, the name is most common in Germany, Austria, and the United States. Very seldom, Auer is the forename as well as the last name.