Family name Thongsavath (Thongsavath 
) , worldwide, is quite a rare cognomen. The last name Thongsavath is characteristic of Laos, where it is quite a common surname, Australia, where it is a very rare surname, and France. Measured by absolute frequency, it is commonest in Laos, the United States, and France. Very seldom, Thongsavath is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thongsavath | Australia, Thailand, France, Laos, United States |