Surname สิทธิยะ (Sittiya 
, สิทธิยะ ) , throughout the world, is a rare last name. The cognomen สิทธิยะ is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Likewise, สิทธิยะ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sittiya | Philippines, United States, India, Thailand |
| สิทธิยะ | Thailand |