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Cognomen ראוך (Rauch , Reoch , ראוך ) , globally, is a common last name. The family name ראוך is habitual in Western Europe, particularly Austria, where it is quite a common surname, Germany, and Switzerland. Not in comparison with a country's population, it is commonest in Germany, the United States, and Austria. Very seldom, ראוך is the forename as well as the last name.