Throughout the world, Xai (Xai 
, ไซ , Хаи 
) is a rare dominantly masculine, but uncommonly feminine first name. The forename Xai is characteristic of Laos, where it is quite a rare male name, Thailand, where it is a rare gender-neutral name, and the United States, where it is a very rare unisex name. Much less frequently, Xai is the last name as well as the forename.