Cognomen Sayyasone (Sayyasone 
) , all over the world, is a rare family name. The last name Sayyasone is habitual in South-eastern Asia, particularly Laos, where it is quite a rare surname, and Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Sayyasone | Laos, Thailand |
Khamla, and Vannaphone