Cognomen รัตนโรจนโกมล (รัตนโรจนโกมล 
) , all around the world, is a very rare last name. The last name รัตนโรจนโกมล is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| รัตนโรจนโกมล | Thailand |