Cognomen Samanratvanich (Samanratvanich 
) , in the entire world, is a very rare last name. The last name Samanratvanich is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Samanratvanich | Thailand |
Nujnapang, Prachkawin, and Netnapis