While watching TV, I noticed that a person interviewed was named In der Maur. Rarely you can read von as prefix, mostly by former nobles, but it's the first time I have read in der as a prefix. I would assume that this is some very old German variant like Mittelhochdeutsch or earlier.
Is it even a German name?
Where does this name come from? From what time or period might this name be? And is it known what kind of people got such a prefix?
Note: I understand that this question might not be the perfect fit for German.SE, but looking at Genealogy.SE, it would be a worse fit there. I also found the
person-name tag here with 68 questions, so I assume it's ok to ask.