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In all the world, Illo (Illo , Илло ) is quite a rare unisex forename. The forename Illo is characteristic of Nigeria, where it is a rare unisex name, South Korea, where it is a rare male name, and Algeria. Measured by absolute frequency, it most frequently occurs in Nigeria, India, and South Korea. Likewise, Illo is the last name as well as the forename.