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Cognomen Braathen (Braathen , Bråthen ) , in all the world, is quite a common last name. The family name Braathen is habitual in Northern Europe, particularly Norway, where it is quite a common surname, Latvia, where it is quite a rare surname, and Sweden. Not in comparison with a country's population, the name is most common in Norway, Sweden, and the United States. Much less frequently, Braathen is the forename as well as the last name.