Throughout the world, Hadai (Hadai 
) is a rare gender-neutral first name. The given name Hadai is characteristic of Algeria, where it is a rare gender-neutral name, Indonesia, where it is a very rare boy's name, and Mexico, where it is a very rare feminine name. Not in comparison with a country's population, the name is most common in India, Algeria, and Indonesia. Likewise, Hadai is the last name as well as the forename.