Cognomen สิทธ์ฤกษ์ (สิทธ์ฤกษ์ 
) , throughout the world, is an extremely rare surname. The surname สิทธ์ฤกษ์ is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| สิทธ์ฤกษ์ | Thailand |