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