"Amtmännin": the nickname of their mother.

"Adelung": alludes to a predecessor dictionary editor.[1] The old high german word "adalunc" in its etymology was made up.

I became aware of these lemmata through this article: https://www.welt.de/kultur/article4127427/Es-war-einmal-das-...

[1] Johann Christoph Adelung (1732-1806): https://en.wikipedia.org/wiki/Johann_Christoph_Adelung