Cognomen Santiwiriyakarn (Santiwiriyakarn 
) , throughout the world, is a very rare family name. The last name Santiwiriyakarn is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Santiwiriyakarn | Thailand |
Rathanon, and Kriangkrai