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Surname Rishan (Rishan , 日山 ) , in the entire world, is quite a common cognomen. The last name Rishan is habitual in Maldives, where it is quite a common surname, Sri Lanka, where it is quite a rare surname, and Qatar. Measured by absolute frequency, it most frequently occurs in Ethiopia, Sri Lanka, and Bangladesh. Also, Rishan is the forename as well as the last name.