Cognomen รุจิวรรธนะกุล (รุจิวรรธนะกุล 
) , across the world, is an extremely rare family name. The surname รุจิวรรธนะกุล is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| รุจิวรรธนะกุล | Thailand |