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In all the world, Atonio (Atonio ) is a rare masculine forename. The first name Atonio is habitual in Equatorial Guinea, where it is quite a rare male name, Fiji, and the Dominican Republic, where it is a rare boy's name. Measured by absolute frequency, this name is the most popular in Brazil, Equatorial Guinea, and Philippines. Much less frequently, Atonio is the last name as well as the forename.