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Throughout the world, Kwai (Kwai , ไกว , ไกว่) is quite a rare epicene forename. The given name Kwai is characteristic of Hong Kong, where it is quite a common epicene name, Taiwan, where it is a rare boy's name, and Singapore, where it is a rare gender-neutral name. In absolute terms, it most frequently occurs in Hong Kong, the United States, and Taiwan. Likewise, Kwai is the last name as well as the forename.
Kwai is also a name for the fictitious and mythical characters: Kwai Chang Caine , the fictional character, Kung Fu.