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In the world, Rayo (Rayo , デ , Райо ) is quite a rare epicene given name. The forename Rayo is habitual in Bulgaria, where it is a rare masculine name, Mexico, where it is a rare gender-neutral name, and Taiwan, where it is a rare female name. Measured by absolute frequency, it most frequently occurs in India, Mexico, and Indonesia. More frequently, Rayo is the last name as well as the forename.