Surname วัตถากรณ์ศิริ (วัตถากรณ์ศิริ 
) , around the globe, is an extremely rare cognomen. The last name วัตถากรณ์ศิริ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| วัตถากรณ์ศิริ | Thailand |