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Worldwide, Hái (Hái ) is an extremely rare male first name. More prevalently, Hái is the last name as well as the forename.
Hai, かい, ハイ, 海, and 海姓
Huy, Miss, Tờ, Chị, Huệ, Đỗ, Tiền, Triệu, Nguyễn, and Vũ Thị