Surname Karolus (Karolus 
) , throughout the world, is quite a rare family name. The cognomen Karolus is habitual in South Africa, where it is a rare surname, Germany, and Malaysia. In absolute terms, it is commonest in South Africa, Germany, and Indonesia. More frequently, Karolus is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Karolus | Germany, South Africa, Poland, India, Indonesia |
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august karolus German physicist (1893-1972), DE (b. 1893) |
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| max karolus (b. 1904) |
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| august karolus Dr. phil. Universität Leipzig 1921 |
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| felix karolus DE (b. 1973) |
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| heinz karolus |
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