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In all the world, Кальмансон (Кальмансон ) is an extremely rare unknown gender forename. Predominantly, Кальмансон is the last name as well as the forename.
Kalmanson
Ігор, Абрам, Роман, Ірина, Марина, Михаил, Евгений, Леопольд, Владимир, Валентина, Олександр, and Екатерина