Cognomen ประพันธ์กุล (ประพันธ์กุล 
, Prapunkul 
) , in the world, is a very rare family name. The cognomen ประพันธ์กุล is characteristic of Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname. Much less frequently, ประพันธ์กุล is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ประพันธ์กุล | Thailand |
| Prapunkul | Thailand, United States |