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Surname קוסט (Cusset , Куст , קוסט ) , in the entire world, is quite a rare last name. The cognomen קוסט is habitual in Belarus, where it is quite a rare surname, France, and Ukraine, where it is a rare surname. Measured by absolute frequency, it is commonest in France, Russia, and Ukraine. Very seldom, קוסט is the forename as well as the last name.