Throughout the world, ประโยงค์ (Prayong 
, ประโยงค์ ) is a rare gender-neutral forename. The first name ประโยงค์ is characteristic of Thailand, where it is a rare gender-neutral name, and the United States, where it is an extremely rare gender-neutral name. Very seldom, ประโยงค์ is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Prayong | Malaysia, Cambodia, Thailand, United States, Myanmar |
| ประโยงค์ | Thailand |