Cognomen Kainonsung (Kainonsung 
) , worldwide, is a very rare last name. The cognomen Kainonsung is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kainonsung | Thailand |
Sanga, Jakjan, Kanlayatip, and Piamkamon