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Surname Айо (Ayo , Ajo , Ailhaud ) , across the world, is a widespread last name. The cognomen Айо is habitual in Sub-Saharan Africa, particularly Nigeria, where it is quite a common surname, Gabon, and Tanzania. Not in comparison with a country's population, it most frequently occurs in Nigeria, Tanzania, and Philippines. Likewise, Айо is the forename as well as the last name.