Surname สุทธิฤกษ์ (สุทธิฤกษ์ 
, Sutdhirork 
, Sutthiroek ) , in the entire world, is a rare family name. The last name สุทธิฤกษ์ is characteristic of Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname. Much less frequently, สุทธิฤกษ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sutthiroek, สุทธิฤกษ์, Sutthikerd | Thailand |
| Sutdhirork | Thailand, United States |
Soodthiruk, Sutarueg, Sutthirugsa, and Suttiruksa