Cognomen Kantachai (กันตชัย 
, Kantachai ) , all around the world, is a rare last name. The last name Kantachai is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Likewise, Kantachai is the forename as well as the last name.
Pakin, Chayanisa, Weerawan, Nannarat, Nattawut, Nattapot, Nattapon, Tatchaya, Jearanai, Prapawan, Panlakar, Chonlada, Chayanan, Amontawan, Yosponn, Pornpimon, Tidarat, Tatarit, Tanatip, Rachata, Pornsri, Kwantiwa, Kannika, Buaphan, Chopaga, Suchada, Siriwan, Sakornlapat, Wanpen, Banyad, Pawee, Tachaya, and Rungnapha