(Might be worth explaining why it sounds made up/like a pseudonym: Unbekannt in German means unknown; similar variations has the same meaning in a range of Germanic languages)
Interesting not really, someone in my family made some research about its past and return to the XVIIth century. From there, we can only make assumptions.
(Might be worth explaining why it sounds made up/like a pseudonym: Unbekannt in German means unknown; similar variations has the same meaning in a range of Germanic languages)