Thanks for handling that, Malka Mysels After i posted my request, i was accepted as a project member, so i can now check and repair such things myself.
Thanks also for noticing that i have made some updates on the main page.
Many of these early Jewish printers, typesetters, and publishers with inter-married family surnames such as Luria, Isserlies, Katz, Katzenellenbogen, Drucker, Juedels, Kohn, Kohen, Bloch, Fraenkel, and Arnstein were related to one another in families that ranged from Italy to Prague and thence to Vienna, the Palantinate, and Franconia. I am not engaging in primary research, but rather gathering together older research and summarizing it here with source-links. I will do a short write-up on the printers of Fúrth next, and then i will take a break.
I am either DNA-cousins with or directly descended from about half of these folks, and i myself am a typesetter and publisher, so this is an area of interest to me.
Cheers!