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Cognomen Richen (日晨 , Richen , รีเจนท์ ) , throughout the world, is a rare surname. The surname Richen is habitual in France, where it is a rare surname, South Africa, where it is a very rare surname, and Australia. In absolute terms, it most frequently occurs in France, China, and the United States. Likewise, Richen is the forename as well as the last name.