Cognomen สุทธะรัตน์ (สุทธะรัตน์ 
) , all over the world, is an extremely rare last name. The surname สุทธะรัตน์ is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| สุทธะรัตน์ | Thailand |