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Cognomen Kojen (كوين , Kojen , Кожен ) , globally, is quite a common family name. The family name Kojen is habitual in Libya, where it is quite a common surname, Iraq, where it is quite a rare surname, and Sudan. Measured by absolute frequency, the name is most common in Iraq, Egypt, and Libya. Very seldom, Kojen is the forename as well as the last name.