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Family name Niebuhr (نيبور , Niebuhr , Нибур ) , throughout the world, is quite a common cognomen. The family name Niebuhr is characteristic of Denmark, where it is quite a rare surname, Germany, and Lesotho. Measured by absolute frequency, it is the most numerous in Germany, the United States, and Denmark. Very seldom, Niebuhr is the forename as well as the last name.