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Last name Ravn (Ravn , Hrafn , Раун ) , all around the world, is quite a common cognomen. The cognomen Ravn is habitual in Northern Europe, particularly Denmark, where it is quite a common surname, Norway, where it is quite a rare surname, and Iceland. Measured by absolute frequency, it is commonest in Northern Europe, particularly Denmark, Norway, and Sweden. Very seldom, Ravn is the forename as well as the last name.