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Last name Dowen (道恩 , Dowen , Douer ) , across the world, is quite a rare cognomen. The cognomen Dowen is characteristic of the United Kingdom, where it is a rare surname, Algeria, and the United States. Not in comparison with a country's population, the name is most common in the United States, the United Kingdom, and China. Likewise, Dowen is the forename as well as the last name.