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Family name Kosar (Kosar
, كوسار
, Косарь
) , across the world, is a common surname. The family name Kosar is habitual in Slovenia, where it is quite a common surname, Pakistan, where it is quite a rare surname, and Slovakia. In absolute terms, it is the most numerous in Pakistan, India, and Ukraine. Also, Kosar is the forename as well as the last name.