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Globally, 希亚 (希亚 , Sheya ) is quite a rare epicene forename. The first name 希亚 is habitual in Namibia, where it is quite a rare boy's name, Nigeria, where it is a rare predominantly boy's, but scarcely feminine name, and China, where it is a very rare unisex name. Measured by absolute frequency, the name is most common in China, India, and Nigeria. Also, 希亚 is the last name as well as the forename.
希亚 is also a name for the fictitious and mythical characters: .