Cognomen วัธนวงศ์ศิริ (วัธนวงศ์ศิริ 
) , in all the world, is a very rare family name. The surname วัธนวงศ์ศิริ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| วัธนวงศ์ศิริ | Thailand |
ญะริชฎา, ลักขณา, and ภิญญาพัชญ์