Surname เพ็ญทอง (เพ็ญทอง 
, Phenthong ) , around the world, is a rare cognomen. The family name เพ็ญทอง is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Also, เพ็ญทอง is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Phenthong, เพ็ญทอง | Thailand |
Penthong, Pheantong, Phengthong, Phengtong, and Phentong