Surname Thavongsa (Thavongsa 
) , worldwide, is a very rare family name. The cognomen Thavongsa is characteristic of Northern America, particularly the United States, where it is an extremely rare surname, and Canada. Much less frequently, Thavongsa is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thavongsa | United States, Canada |