Cognomen Karjohn (Karjohn 
) , all around the world, is a rare family name. The last name Karjohn is habitual in Jamaica, where it is quite a rare surname, the United Kingdom, where it is an extremely rare surname, and the United States. Very seldom, Karjohn is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Karjohn | United States, United Kingdom, Thailand, Jamaica |
| kristal karjohn badminton player, JM (b. 1984) |
|