Family name Poonjai (พูลใจ 
, Poonjai ) , in all the world, is a very rare surname. The family name Poonjai is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Also, Poonjai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Poonjai, พูลใจ | Thailand |