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Worldwide, האו (Hao , How , Howe ) is a common largely masculine, but infrequently female first name. The given name האו is habitual in Macao, where it is quite a common epicene name, Vietnam, where it is quite a common primarily male, but very seldom female name, and Belize, where it is quite a common male name. Measured by absolute frequency, it is the most numerous in Vietnam, China, and the United States. More prevalently, האו is the last name as well as the forename.
האו is also a name for the fictitious and mythical characters: Hao Asakura , the fictional character from Shaman King.