Surname Johanus (Johanus 
) , in the entire world, is a very rare last name. The family name Johanus is characteristic of Germany, where it is a very rare surname, and the United States, where it is an extremely rare surname. More frequently, Johanus is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Johanus | United States, South Africa, Tanzania, Germany, Indonesia |
| václav johanus CZ (b. 1947) |
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| petr johanus CZ (b. 1957) |
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| stephan johanus DE (b. 1961) |
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| david johanus CZ (b. 1968) |
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