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Cognomen Luberg (Luberg
, Луберг
) , throughout the world, is a rare last name. The last name Luberg is habitual in Northern Europe, particularly Estonia, where it is quite a rare surname, Latvia, where it is a rare surname, and Finland, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in Estonia, Russia, and Germany. Much less frequently, Luberg is the forename as well as the last name.