In the research I do on my great - grandfather's side:
Hanagid Hachasid Rabbi Zysman Rajzman, zt"l
I arrived that the rajzman family (reizman) were originally a branch of the Ginzburg family who lived in the town of Reiz in the state of Bavaria.
In order to continue my research, I need to research the various branches of the Ginzburg family (especially in the state of Bayern).
Apart from the book on the history of the Ginzburg family (not all branches of the family are mentioned in it), are there any other books or other sources I can use?
many thanks