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Last name ริยาด (Riyad , Riyat , Riyade ) , around the world, is a common cognomen. The family name ริยาด is characteristic of Oman, where it is quite a common surname, Bangladesh, and Algeria (explore the name in all countries). In absolute terms, it most frequently occurs in Bangladesh, Algeria, and Morocco. Also, ริยาด is the forename as well as the last name.