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All over the world, 桓 (Huan , 桓 ) is a common largely masculine, but infrequently feminine first name. The given name 桓 is habitual in Macao, where it is quite a rare masculine name, Vietnam, and Hong Kong, where it is quite a rare epicene name. In absolute terms, this name is the most popular in China, Vietnam, and the United States. Likewise, 桓 is the last name as well as the forename.
桓 is also a name for the fictitious and mythical characters: E Huan , the fictional character in Romance of the Three Kingdoms and Huan , character in The Silmarillion.