Family name Eardthong (Eardthong 
) , globally, is a very rare cognomen. The surname Eardthong is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Eardthong | Thailand |
Supaporn, Kittiphoom, Thanaporn, Thanikant, and Thanikarnt