Across the world, Karl Johan (Karl Johan 
) is a rare masculine forename. The forename Karl Johan is characteristic of Eswatini, where it is quite a rare male name, and Sweden, where it is a rare boy's name. Very seldom, Karl Johan is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Karl Johan | Eswatini, Sweden, Chile, Spain, Denmark |