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Last name Khuai (Khuai , خواي) , in the world, is a rare cognomen. The surname Khuai is habitual in Malaysia, where it is a rare surname, Myanmar, where it is a very rare surname, and Canada, where it is an extremely rare surname. Not in comparison with a country's population, it is the most numerous in Malaysia, Myanmar, and China. Likewise, Khuai is the forename as well as the last name.