Family name Ratanavanh (Ratanavanh 
) , in the world, is a very rare surname. The cognomen Ratanavanh is habitual in France, where it is a very rare surname, Canada, where it is an extremely rare surname, and China. In absolute terms, it is the most numerous in China, France, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Ratanavanh | Canada, France, United States, Thailand, China |