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Cognomen Kolaj (Collage , Kolaj ) , all around the world, is quite a rare surname. The last name Kolaj is habitual in Albania, where it is quite a common surname, Kosovo, where it is quite a rare surname, and Greece. Not in comparison with a country's population, the name is most common in Albania, India, and Greece. Likewise, Kolaj is the forename as well as the last name.