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All over the world, Casio (Casio , カシオ , Касий ) is a rare predominantly male, but scarcely girly first name. The forename Casio is characteristic of Israel, where it is a rare predominantly feminine, but scarcely male name, Peru, where it is a rare male name, and Philippines, where it is a rare principally boy's, but very infrequently feminine name. In absolute terms, it is commonest in Brazil, Philippines, and Indonesia. More frequently, Casio is the last name as well as the forename.