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Globally, דיי (Day , Dae , Dey ) is a common gender-neutral first name. The forename דיי is habitual in Israel, where it is quite a common masculine name, Paraguay, where it is quite a rare female name, and Mongolia. In absolute terms, it most frequently occurs in Indonesia, India, and Israel. Predominantly, דיי is the last name as well as the forename.
דיי is also a name for the fictitious and mythical characters: .