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All around the world, クリオ (Clio , クリオ , Curio ) is quite a rare epicene given name. The first name クリオ is characteristic of Algeria, where it is quite a rare mostly male, but uncommonly female name, Hong Kong, where it is a rare feminine name, and Italy, where it is a rare gender-neutral name. In absolute terms, it is commonest in Algeria, Italy, and France. Likewise, クリオ is the last name as well as the forename.
クリオ is also a name for the fictitious and mythical characters: Clio , the Greek mythological person, muse of history or of lyre playing, daughter of Zeus and the Titaness Mnemosyne; Clio , the character from Disney's Hercules; Clio , the Nereid of Greek mythology, daughter of Nereus and Doris; Clio , the operatic character in the opera Il Parnasso in festa and Curio , the operatic character in the opera Giulio Cesare, Giulio Cesare in Egitto, among other works.