Family name Thongnaka (Thongnaka 
) , worldwide, is a very rare cognomen. The family name Thongnaka is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Thongnaka | Thailand |
Suchanun, Sittipong, Suthachinee, and Chakaphan