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Across the world, Koai (Kai , Koai ) is a common gender-neutral forename. The given name Koai is characteristic of Macao, where it is quite a common epicene name, Guam, where it is quite a common female name, and Hong Kong, where it is quite a common largely boy's, but infrequently feminine name (explore the name in all countries). Not in comparison with a country's population, the name is most common in India, Germany, and the United States. Also, Koai is the last name as well as the forename.
Koai is also a popular name for the fictitious and mythical characters: Kai Bartley , the fictional character from Grey's Anatomy; Kai Shiden , the fictional character from Mobile Suit Gundam; Kai von Mölln , the character from Thomas Mann's Buddenbrooks; Kai , the imaginary figure from the TV series ''Lego Ninjago", The Lego Ninjago Movie and Kai , the character in The Legend of Korra, and in many other works.