Cognomen เพ็ญสุขใจ (เพ็ญสุขใจ 
, Pensukjai , Phensukjai ) , across the world, is a very rare family name. The family name เพ็ญสุขใจ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Pensukjai, เพ็ญสุขใจ, Phensukjai | Thailand |