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Last name Олен (Olen , Олен ) , all over the world, is quite a rare surname. The last name Олен is habitual in Estonia, where it is quite a common surname, Papua New Guinea, where it is quite a rare surname, and Sweden, where it is a rare surname. In absolute terms, it is the most numerous in the United States, Indonesia, and Estonia. Also, Олен is the forename as well as the last name.