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Cognomen Kahun (Kahun , Кахун , Кагун ) , throughout the world, is a very rare family name. The family name Kahun is habitual in Eastern Europe, particularly Hungary, where it is a very rare surname, Russia, and Ukraine. Measured by absolute frequency, the name is most common in Russia, India, and Hungary. Likewise, Kahun is the forename as well as the last name.