Cognomen Chaiyachit (Chaiyachit 
) , all around the world, is a rare last name. The surname Chaiyachit is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Much less frequently, Chaiyachit is the forename as well as the last name.
Chai, Thanyaphon, Wichitchai, Jiratapol, Pornpavit, Kingkamon, Hatairat, Haruthai, Titipong, Jatuporn, Ravikarn, Predanuch, Peedanuch, Peeravit, Peerasan, Warangkana, Parichat, Achiraya, Amornrat, Suparuek, Sasipron, Theetach, Jantima, Piyanut, Pimthara, Somvang, Sirapop, Warong, Rachen, Suriya, Renu, Kittikan, and Wutthichai