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Family name Rien (连 , Rien , リエン ) , around the world, is a widespread last name. The last name Rien is habitual in China, where it is quite a common surname, Algeria, where it is quite a rare surname, and Tunisia, where it is a rare surname. In absolute terms, the name is most common in China, Indonesia, and Algeria. Much less frequently, Rien is the forename as well as the last name.