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Surname Martius (Mart , Mars , Martius ) , throughout the world, is a common last name. The last name Martius is habitual in British Virgin Islands, where it is quite a common surname, U.S. Virgin Islands, and Mauritius (explore the name in all countries). Measured by absolute frequency, the name is most common in Indonesia, the United States, and Morocco. Likewise, Martius is the forename as well as the last name.