Surname Houyhongthong (Houyhongthong 
) , worldwide, is a very rare family name. The last name Houyhongthong is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Houyhongthong | Thailand |
Siwaporn, Natthaya, Pachichit, and Boonyaporn