Cognomen ปิยวัชรเดช (ปิยวัชรเดช 
) , throughout the world, is a very rare surname. The surname ปิยวัชรเดช is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| ปิยวัชรเดช | Thailand |
นิธิดา, and นิธิพันธุ์