Throughout the world, เพียรประเสริฐ (เพียรประเสริฐ 
, Prianprasert , Pianpasert ) is a very rare mostly masculine, but infrequently female first name. The first name เพียรประเสริฐ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare mostly male, but uncommonly girly name. More frequently, เพียรประเสริฐ is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Pianprasert, Pianpasert, Prianprasert, เพียรประเสริฐ | Thailand |
Paerprasert, Peanprasert, Phianprasert, Phianprasoet, Plianprasert, and Plianprasroet