early in next year I will myself try to get more info and data from Franzfeld and might be able to help you with some issues there. I already had a phone chat with a woman who seems to be the ranking human "encyclopedia" on the history of Franzfeld with loads of info, she'll look into more details about my Grandmother's family (my grandfather's family from Lazarfeld is already well documented by me).
Why don't you send me your contact info to my email address and I'll see what sources and contacts I can get you?
Email address is firstname.lastname@example.org
Cheerio from Munich, Germany,