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Family name Rahr (Rahr
, Рар
) , in the world, is a rare last name. The surname Rahr is habitual in Armenia, where it is quite a rare surname, Denmark, and Germany, where it is a rare surname. Measured by absolute frequency, this name is the most popular in the United States, Germany, and Denmark. Much less frequently, Rahr is the forename as well as the last name.