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Globally, Jahnsen (Jahnsen
) is a very rare gender-neutral given name. The given name Jahnsen is habitual in South-eastern Asia, particularly Philippines, where it is a very rare unisex name. Much more frequently, Jahnsen is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Jahnsen | United States, Norway, Germany, Chile, Peru |