Cognomen สิทธิยาภรณ์ (สิทธิยาภรณ์ 
) , all around the world, is an extremely rare surname. The family name สิทธิยาภรณ์ is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More frequently, สิทธิยาภรณ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สิทธิยาภรณ์ | Thailand |