Worldwide, ปิยะมาตร์ (ปิยะมาตร์ 
) is a very rare primarily feminine, but very infrequently boy's first name. The forename ปิยะมาตร์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare predominantly female, but very infrequently boy's name. Much less frequently, ปิยะมาตร์ is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| ปิยะมาตร์ | Thailand |
ยงศิริชัยสกุล, and อินจัน