Last name ปิยวรรณวงศ์ (ปิยวรรณวงศ์ 
) , all around the world, is a very rare cognomen. The surname ปิยวรรณวงศ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| ปิยวรรณวงศ์ | Thailand |