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