Family name Karuwan (Karuwan 
) , all over the world, is a very rare cognomen. The surname Karuwan is habitual in Thailand, where it is a very rare surname, and India, where it is an extremely rare surname. Very seldom, Karuwan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Karuwan | India, Thailand |