Last name ปิยะนิโรทัย (ปิยะนิโรทัย 
) , all around the world, is an extremely rare surname. The cognomen ปิยะนิโรทัย is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| ปิยะนิโรทัย | Thailand |