Globally, ปิยะจันทร์ (Piyajan 
, ปิยะจันทร์ , Piyajun ) is a rare mostly feminine, but uncommonly male first name. The forename ปิยะจันทร์ is habitual in Southern Asia, particularly India, where it is a very rare mostly female, but infrequently boy's name. Much less frequently, ปิยะจันทร์ is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Piyajun, Piyajan | Thailand, India |
| ปิยะจันทร์ | Thailand |