Cognomen รัตนวัฒน์ (Rattawat 
, รัตนวัฒน์ , Ratradawat ) , around the world, is a rare last name. The last name รัตนวัฒน์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Likewise, รัตนวัฒน์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rattawat | Thailand, United States |
| Pratniwat, Ratradawat, รัตนวัฒน์ | Thailand |
Ratanawat, Ratanwat, and Rattanawat