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Cognomen Rumian (Rumian , Румян ) , in the world, is a rare last name. The surname Rumian is habitual in Poland, where it is quite a rare surname, Albania, where it is a rare surname, and Czechia. Measured by absolute frequency, this name is the most popular in Eastern Europe, particularly Poland, Russia, and Czechia. Also, Rumian is the forename as well as the last name.