Throughout the world, Phetwanichkul (Phetwanichkul 
) is an extremely rare unknown gender forename. Much more frequently, Phetwanichkul is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Phetwanichkul | Thailand |
Kanrada, Kulrada, Napapach, and Naphachara