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Cognomen Kouchner (Бернар , Кушнер , Kouchner ) , globally, is quite a rare surname. The cognomen Kouchner is characteristic of Belarus, where it is quite a common surname, Russia, where it is quite a rare surname, and Israel. In absolute terms, this name is the most popular in Eastern Europe, particularly Russia, Belarus, and Ukraine. Very seldom, Kouchner is the forename as well as the last name.