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Cognomen Eyer (ا. , Eyer , Айер ) , all over the world, is quite a rare last name. The surname Eyer is characteristic of Western Europe, particularly Switzerland, where it is quite a common surname, Belgium, where it is a rare surname, and France. In absolute terms, this name is the most popular in the United States, Switzerland, and France. Very seldom, Eyer is the forename as well as the last name.