Cognomen สิทธิญาณ (สิทธิญาณ 
) , in the entire world, is a very rare surname. The family name สิทธิญาณ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Likewise, สิทธิญาณ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สิทธิญาณ | Thailand |