Surname Khongnak (Khongnak 
) , globally, is a very rare family name. The family name Khongnak is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Much less frequently, Khongnak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Khongnak | India, Thailand |
| anupong khongnak Thai entomologist |
|