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Cognomen אייר (Air , Ayer , Ajer ) , around the globe, is a common surname. The cognomen אייר is habitual in Nepal, where it is quite a common surname, Switzerland, and Norway, where it is quite a rare surname. Measured by absolute frequency, the name is most common in Nepal, India, and the United States. Likewise, אייר is the forename as well as the last name.