Last name เพิมสิทธิ์ (เพิมสิทธิ์ 
) , around the globe, is a very rare cognomen. The surname เพิมสิทธิ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Likewise, เพิมสิทธิ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| เพิมสิทธิ์ | Thailand |