Our Daler's came from Hersdorf, then in Alsace which was in France at that time. So you are correct sometimes it was French, sometimes German. That area flipped back and forth. Hersdorf today in Germany. Some of our info says France and other German. I don't have the names of all the siblings but for 3 sisters but understand there were several. So far no Walter or Irene. Keeping you in mind in search. Don't give up.