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Cognomen Riyat (Riyat , Рият , ริยาด ) , around the globe, is a rare last name. The cognomen Riyat is habitual in Morocco, where it is a rare surname, the United Kingdom, and New Zealand. Measured by absolute frequency, it is the most numerous in India, the United Kingdom, and Indonesia. Likewise, Riyat is the forename as well as the last name.