Cognomen Ananthachai (อนันตชัย 
, อนันธชัย , Ananthachai ) , in the world, is a rare surname. The last name Ananthachai is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Much more prevalently, Ananthachai is the forename as well as the last name.
Sojayya, Eerian, Kowathana, Pechrot, Thumdung, Nawasod, Aekanankonkun, Cheysuwan, Limsakul, Ekanankonkun, Khamhaeng, Theraphan, Nammungkhun, and Wimonphan