Surname หิรัญวงศ์ปิยะ (หิรัญวงศ์ปิยะ 
) , globally, is an extremely rare cognomen. The family name หิรัญวงศ์ปิยะ is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| หิรัญวงศ์ปิยะ | Thailand |