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Surname Дукас (Doukas , Dukas , Дукас ) , throughout the world, is quite a common cognomen. The last name Дукас is habitual in Greece, where it is quite a common surname, Albania, where it is quite a rare surname, and Lithuania, where it is a rare surname. Not in comparison with a country's population, the name is most common in Greece, the United States, and Australia. Much less frequently, Дукас is the forename as well as the last name.