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In the world, Квай (Kwai
, Quay
, Квай) is quite a rare gender-neutral forename. The forename Квай is characteristic of Hong Kong, where it is quite a common epicene name, Taiwan, where it is a rare masculine name, and Singapore, where it is a rare gender-neutral name. Not in comparison with a country's population, it is commonest in the United States, Hong Kong, and Vietnam. Likewise, Квай is the last name as well as the forename.
Квай is also a name for the fictitious and mythical characters: Kwai Chang Caine , the fictional character, Kung Fu.