Surname ปิยะกาญจน์ (Piyakan 
, Piyakarn 
, ปิยะกาญจน์ ) , in the world, is a rare cognomen. The surname ปิยะกาญจน์ is habitual in Thailand, where it is quite a rare surname, China, where it is an extremely rare surname, and the United States. More prevalently, ปิยะกาญจน์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Piyakan | United States, India, Thailand, China |
| Piyakarn | United States, United Kingdom, Thailand |
| ปิยะกาญจน์ | Thailand |
| Piyagarn | United Kingdom, Thailand |
Piyacarn, and Piyakarmon