Surname Kasayanon (Kasayanon 
) , in the entire world, is a very rare family name. The surname Kasayanon is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kasayanon | Thailand |
Apinya, Pongsak, Rattheera, and Phitchayanan