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Last name Ruppel (Ruppel
, Руппель
, Руппел
) , worldwide, is a common surname. The last name Ruppel is habitual in Argentina, where it is quite a rare surname, Germany, and Kazakhstan. Measured by absolute frequency, it is commonest in Germany, Argentina, and the United States. Much less frequently, Ruppel is the forename as well as the last name.