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Last name Kalna (Kalna , Кална ) , throughout the world, is a rare family name. The family name Kalna is habitual in Latvia, where it is quite a common surname, Czechia, where it is quite a rare surname, and Hungary, where it is a rare surname. Measured by absolute frequency, the name is most common in Latvia, the United States, and Czechia. Likewise, Kalna is the forename as well as the last name.