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Cognomen Rieger (Rieger , Ригер , リーガー) , globally, is a common family name. The surname Rieger is habitual in Austria, where it is quite a common surname, Germany, and Czechia, where it is quite a rare surname. Not in comparison with a country's population, it most frequently occurs in Germany, the United States, and Austria. Much less frequently, Rieger is the forename as well as the last name.