Surname Jannen (Jannen 
) , around the world, is a rare family name. The family name Jannen is characteristic of Tunisia, where it is quite a rare surname, Germany, where it is a very rare surname, and Netherlands. In absolute terms, this name is the most popular in Tunisia, the United States, and Germany. Also, Jannen is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jannen | Japan, Philippines, United States, Indonesia, Tunisia |
| reinhard jannen (b. 1955) |
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| william karl jannen Ph.D. State University of New York at Stony Brook 2017 |
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