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Cognomen Халдін (Халдін ) , in the world, is a very rare family name. The last name Халдін is habitual in Eastern Europe, particularly Ukraine, where it is a very rare surname.
Chaldin, Haldin, Khaldin, and Xaldin
Віктор, Сергій, Георгій, Валерій, Володимир, and Олександр