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Cognomen Zwan (Zwan , Зван ) , in the world, is quite a rare surname. The cognomen Zwan is characteristic of Netherlands, where it is quite a common surname, Syria, where it is quite a rare surname, and Morocco, where it is a rare surname. In absolute terms, this name is the most popular in Netherlands, Syria, and Brazil. Much less frequently, Zwan is the forename as well as the last name.