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Last name Rudiger (Rudiger , Рудигер ) , worldwide, is quite a rare surname. The surname Rudiger is habitual in Estonia, where it is quite a common surname, Paraguay, where it is quite a rare surname, and Switzerland, where it is a rare surname. In absolute terms, it most frequently occurs in the United States, Brazil, and Germany. Also, Rudiger is the forename as well as the last name.