In all the world, Karolj (Karolj 
) is a very rare boy's first name. The first name Karolj is habitual in Southern Europe, particularly Croatia, where it is a rare boy's name. Likewise, Karolj is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Karolj | Croatia, Sweden, Serbia, Germany, Canada |
| karolj vicek RS (b. 1943) |
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| karolj kasap Olympic wrestler, CA (b. 1954) |
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| karolj djerfi chess player (b. 1956) |
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| karolj kopas athlete (born 1958) (b. 1958) |
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