Surname Thanasiri (Thanasiri 
, ธนาศิริ , ธนะสิริ ) , globally, is a rare family name. The family name Thanasiri is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Likewise, Thanasiri is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thanasiri, ธนาศิริ, ธนะสิริ | Thailand |