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Last name Kalmar (Kalmar , Kalmár , Кальмар ) , worldwide, is a common family name. The surname Kalmar is characteristic of Hungary, where it is quite a common surname, Bosnia and Herzegovina, and Serbia, where it is quite a rare surname. Not in comparison with a country's population, the name is most common in Hungary, the United States, and Serbia. Much less frequently, Kalmar is the forename as well as the last name.