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Family name Guen (グエン , Guen , หนูเกน ) , all around the world, is quite a common cognomen. The family name Guen is habitual in France, where it is quite a rare surname, Algeria, and Malaysia. Not in comparison with a country's population, it is the most numerous in France, Algeria, and the Democratic Republic of the Congo. Also, Guen is the forename as well as the last name.