Cognomen สุทธินาท (สุทธินาท 
) , worldwide, is an extremely rare family name. The family name สุทธินาท is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More prevalently, สุทธินาท is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สุทธินาท | Thailand |