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In all the world, Oyin (Oyin , หยิน ) is quite a rare gender-neutral given name. The forename Oyin is habitual in Nigeria, where it is a rare epicene name, Hong Kong, where it is a rare feminine name, and Thailand, where it is a rare unisex name. Measured by absolute frequency, this name is the most popular in Nigeria, India, and Indonesia. Much less frequently, Oyin is the last name as well as the forename.