Cognomen Kanthayon (Kanthayon 
) , in the world, is a very rare family name. The surname Kanthayon is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kanthayon | Thailand |
Charoen, Jittraporn, Natthanun, Pitchaporn, and Thanawadee