Last name เพียรสุภาพ (Diligent 
, เพียรสุภาพ 
) , around the world, is a rare family name. The cognomen เพียรสุภาพ is habitual in France, where it is a rare surname, Czechia, and Bulgaria. In absolute terms, it is the most numerous in France, Thailand, and Czechia. Also, เพียรสุภาพ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Diligent | China, Czechia, Sri Lanka, United States, France |
| เพียรสุภาพ | Thailand |