Cognomen Sayhong (Sayhong 
) , all over the world, is a very rare family name. The surname Sayhong is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname, and Malaysia, where it is an extremely rare surname. Very seldom, Sayhong is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sayhong | Thailand, United States, Malaysia |