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All around the world, 希雅 (Sia , 希雅 ) is a common gender-neutral first name. The first name 希雅 is habitual in Tanzania, where it is quite a common girly name, Brunei, where it is quite a common epicene name, and Greece, where it is quite a common principally feminine, but very seldom male name. In absolute terms, it is commonest in Tanzania, Indonesia, and Greece. Likewise, 希雅 is the last name as well as the forename.
希雅 is also a name for the fictitious and mythical characters: .