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Last name Халдин (Haldin , Халдин , Khaldin ) , all around the world, is a rare surname. The surname Халдин is habitual in Finland, where it is quite a rare surname, Sweden, where it is a rare surname, and Russia. Not in comparison with a country's population, the name is most common in Russia, Finland, and Indonesia. Also, Халдин is the forename as well as the last name.