Family name Prajai (Prajai 
) , around the world, is a very rare last name. The family name Prajai is habitual in Thailand, where it is a rare surname, Malaysia, where it is a very rare surname, and India, where it is an extremely rare surname. Much less frequently, Prajai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Prajai | United States, Malaysia, India, Thailand |