Surname ถนิมสุทธิ์ (ถนิมสุทธิ์ 
) , all around the world, is an extremely rare family name. The surname ถนิมสุทธิ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| ถนิมสุทธิ์ | Thailand |