Family name เพิ่มพูลศักดิ์ (เพิ่มพูลศักดิ์, Permpoonsak 
) , around the world, is a very rare surname. The surname เพิ่มพูลศักดิ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Permpoonsak | Thailand |