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In the world, Annio (Annio
) is a rare epicene given name. The first name Annio is characteristic of Southern Europe, particularly Greece, where it is a rare unisex name, and Italy, where it is a rare mostly male, but infrequently girly name. Also, Annio is the last name as well as the forename.
Annio is also a name for the fictitious and mythical characters: Annio , the operatic character in the opera La clemenza di Tito by Wolfgang Amadeus Mozart; a young patrician, friend of Sesto, in love with Servilia.