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Family name Rumin (Rumin , 汝敏 , 茹敏 ) , throughout the world, is quite a rare last name. The family name Rumin is habitual in Croatia, where it is quite a rare surname, Poland, where it is a rare surname, and France. Measured by absolute frequency, it most frequently occurs in China, Indonesia, and Poland. More frequently, Rumin is the forename as well as the last name.