Cognomen ภาธรธัญสิริ (ภาธรธัญสิริ 
) , throughout the world, is an extremely rare surname. The family name ภาธรธัญสิริ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| ภาธรธัญสิริ | Thailand |