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All over the world, ハガイ (Hagai , Haggai , ハガイ ) is a common primarily masculine, but very seldom feminine given name. The forename ハガイ is habitual in Israel, where it is quite a common male name, Tanzania, where it is quite a rare primarily male, but scarcely feminine name, and Zambia, where it is quite a rare male name. Measured by absolute frequency, this name is the most popular in Israel, Tanzania, and Nigeria. Likewise, ハガイ is the last name as well as the forename.
ハガイ is also a name for the fictitious and mythical characters: .