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All around the world, سيا (Sia , Cea , Seiya ) is a common unisex first name. The given name سيا is habitual in Tanzania, where it is quite a common girly name, Brunei, where it is quite a common unisex name, and Greece, where it is quite a common predominantly feminine, but scarcely masculine name. Measured by absolute frequency, it is commonest in Tanzania, Indonesia, and India. More frequently, سيا is the last name as well as the forename.
سيا is also a name for the fictitious and mythical characters: .