Last name ถิรพันธุ์ (ถิรพันธุ์ 
) , in the entire world, is a very rare cognomen. The cognomen ถิรพันธุ์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Likewise, ถิรพันธุ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ถิรพันธุ์ | Thailand |