Cognomen Sengsosouvanh (Sengsosouvanh 
) , all over the world, is quite a rare last name. The last name Sengsosouvanh is characteristic of South-eastern Asia, particularly Laos, where it is quite a common surname, and Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Sengsosouvanh | Laos, Thailand |