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Last name Riam (ريام , เรียม , Riam ) , globally, is quite a rare family name. The cognomen Riam is characteristic of Iraq, where it is quite a rare surname, Malaysia, and Oman, where it is a rare surname. Measured by absolute frequency, it is the most numerous in Iraq, Egypt, and Malaysia. Predominantly, Riam is the forename as well as the last name.