I just found this thread when I was searching for information about Carl Christian von Mehren. Believe it or not but he's my 5 times great grandfather!!! My great, great grandfather is Christian Louis von Mehren(born 1853), brother to Wilhelm Espersen von Mehren.
My grandfather's (Torsten Falk) mother was Ida von Mehren who is a cousinne to Erik Dampe, husband to Dagmar Korsgaard-Jensen.
I've got some information that you might like and I would be really happy if you could contact me.
Malin Falk, Sweden.