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Cognomen Dayo (Dayo , ダイオ , دايو ) , across the world, is a common surname. The cognomen Dayo is habitual in Nigeria, where it is quite a common surname, Philippines, where it is quite a rare surname, and Iceland. Measured by absolute frequency, it most frequently occurs in Nigeria, Philippines, and Pakistan. Likewise, Dayo is the forename as well as the last name.