Surname Xaiyavongsa (Xaiyavongsa 
) , globally, is a rare cognomen. The family name Xaiyavongsa is habitual in South-eastern Asia, particularly Laos, where it is quite a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Xaiyavongsa | Laos |
Pavina, Suannalong, Sompong, Somchai, and Latsamy