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Family name Kaun (Kaun , Каун , קאון ) , in the entire world, is quite a rare cognomen. The surname Kaun is habitual in Reunion, where it is quite a common surname, Estonia, where it is quite a rare surname, and Germany. In absolute terms, the name is most common in Germany, Russia, and Myanmar. Very seldom, Kaun is the forename as well as the last name.