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Throughout the world, Cái (才 , 财 , 財 ) is a common principally male, but scarcely female forename. The forename Cái is characteristic of China, where it is quite a rare predominantly male, but scarcely female name, and Vietnam, where it is a very rare gender-neutral name. Also, Cái is the last name as well as the forename.
Cái is also a name for the fictitious and mythical characters: Jae , the fictional character from Star Trek: The Next Generation.