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Last name Duen (Duen , ديوان , ดื่น) , around the world, is quite a rare surname. The cognomen Duen is habitual in Bermuda, where it is quite a rare surname, Taiwan, and Hong Kong. Not in comparison with a country's population, this name is the most popular in Taiwan, Iran, and Malaysia. Also, Duen is the forename as well as the last name.