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