Family name แก้วไธสง (แก้วไธสง, Kaethaisong 
, Thaisong 
) , all around the world, is a rare surname. The surname แก้วไธสง is habitual in Thailand, where it is a rare surname, Malaysia, where it is a very rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kaethaisong | Thailand |
| Thaisong | Malaysia, Thailand, United States |