Family name สิทธิ์เวทิศเดช (สิทธิ์เวทิศเดช 
) , globally, is an extremely rare cognomen. The last name สิทธิ์เวทิศเดช is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| สิทธิ์เวทิศเดช | Thailand |