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Last name קובנר (Kempner , Kowner , קובנר ) , throughout the world, is quite a rare cognomen. The last name קובנר is habitual in Israel, where it is quite a rare surname, Lithuania, where it is a rare surname, and Brazil. In absolute terms, the name is most common in Brazil, the United States, and Germany. Much less frequently, קובנר is the forename as well as the last name.