Cognomen รัชฎาวรรณ์ (Ratchadawan 
, รัชฎาวรรณ์ , Rattchadawun ) , across the world, is a very rare last name. The surname รัชฎาวรรณ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname, and Malaysia. Much more frequently, รัชฎาวรรณ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ratchadawan | Thailand, United Kingdom, United States, Malaysia |
| รัชฎาวรรณ์, Rattchadawun | Thailand |
โชตฉิมมะดัน, ขาวแสง, and ทุมวงศ์