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Surname ریاحی (Riyahi , ریاحی ) , around the globe, is quite a rare cognomen. The cognomen ریاحی is habitual in Tunisia, where it is quite a rare surname, Morocco, and Kuwait, where it is a rare surname. Measured by absolute frequency, it is commonest in Morocco, Tunisia, and Iran. Much less frequently, ریاحی is the forename as well as the last name.