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Family name Gaier (Гайер
, Gaier
, غاير) , around the globe, is quite a rare last name. The cognomen Gaier is habitual in Austria, where it is quite a rare surname, Kazakhstan, and Germany, where it is a rare surname. Not in comparison with a country's population, the name is most common in Germany, the United States, and Brazil. Much less frequently, Gaier is the forename as well as the last name.