Around the world, Niwatchai (Niwatchai 
) is a very rare boy's first name. The given name Niwatchai is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare male name. Much less frequently, Niwatchai is the last name as well as the forename.
Titla, Palakawong, Chaichang, Atsawamet, Sombatmak, Yiamsombat, Thainant, Gasemmongkol, Kamonjan, Boongodpetch, Bourthong, Chaikaew, Mahachai, Jaikham, Khearnkun, Khampee, Bhummaphan, Sarasri, Raksakaew, and Prasertdhanakul