Cognomen Passuwan (Passuwan 
) , in the entire world, is a very rare surname. The last name Passuwan is habitual in Thailand, where it is a very rare surname, and India, where it is an extremely rare surname. Also, Passuwan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Passuwan | India, Thailand |