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In the world, Касио (Cassio , Kashio , Касио ) is a common male first name. The first name Касио is habitual in Brazil, where it is quite a common boy's name, Albania, where it is a rare masculine name, and Portugal. Measured by absolute frequency, it is commonest in Brazil, Italy, and Angola. Much less frequently, Касио is the last name as well as the forename.
Касио is also a name for the fictitious and mythical characters: Cassio Tagge , character in Star Wars: Episode IV – A New Hope and Cassio , the operatic character in the opera Otello by Giuseppe Verdi; Otello's captain.