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Family name Ruehl (رويل , Ruehl , Rühl ) , globally, is a common cognomen. The last name Ruehl is habitual in Germany, where it is quite a common surname, Austria, where it is quite a rare surname, and Lithuania, where it is a rare surname. Measured by absolute frequency, this name is the most popular in Germany, the United States, and Austria. Very seldom, Ruehl is the forename as well as the last name.