Surname สัทธศักดิ์ศิริ (สัทธศักดิ์ศิริ 
) , in the entire world, is an extremely rare cognomen. The cognomen สัทธศักดิ์ศิริ is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| สัทธศักดิ์ศิริ | Thailand |