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