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Globally, Cairu (彩茹 , 彩如 , Cairu ) is quite a rare principally feminine, but very seldom boy's first name. The first name Cairu is habitual in China, where it is a rare primarily feminine, but scarcely masculine name, and Brazil, where it is an extremely rare largely boy's, but infrequently female name. Much less frequently, Cairu is the last name as well as the forename.