Family name ปิยธโร (ปิยธโร 
) , in the entire world, is a very rare last name. The last name ปิยธโร is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| ปิยธโร | Thailand |
| หลวงปู่ผินะ ปิยธโร (b. 1913) |
|