Last name สิษฐ์หิรัญ (สิษฐ์หิรัญ 
) , in the entire world, is an extremely rare surname. The family name สิษฐ์หิรัญ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| สิษฐ์หิรัญ | Thailand |