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Last name Leren (乐仁 , Leren , Leer ) , in all the world, is quite a rare surname. The family name Leren is habitual in Aruba, where it is quite a common surname, Norway, and Netherlands, where it is quite a rare surname. Not in comparison with a country's population, it is the most numerous in the United States, Netherlands, and Norway. Likewise, Leren is the forename as well as the last name.