Cognomen Sehwan (Sehwan 
) , throughout the world, is a rare last name. The surname Sehwan is habitual in South Korea, where it is a rare surname, Malaysia, where it is a very rare surname, and Pakistan, where it is an extremely rare surname. In absolute terms, it is the most numerous in South Korea, China, and Pakistan. More frequently, Sehwan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sehwan | China, Pakistan, United States, Malaysia, South Korea |