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In the entire world, Oko (Oko , Ооко) is a common unisex given name. The forename Oko is habitual in Nigeria, where it is quite a common gender-neutral name, Ghana, where it is quite a rare masculine name, and Japan, where it is a rare largely boy's, but uncommonly girly name. Not in comparison with a country's population, it most frequently occurs in Nigeria, Japan, and Indonesia. More frequently, Oko is the last name as well as the forename.