Hai \hai\ as a boy's name is a variant of Chai (Hebrew), and the meaning of Hai is "living, vital".

The baby name Hai sounds like Hi, Hy, How, Huw and Hew. Other similar baby names are Cai, Haim, Dai, Hadi, Haig, Hal, Hali, Ham, Hani, Han, Hari, Jai, Kai and Rai.