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