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