The Saxon State Library in Dresden (SLUB) has an on-line address book for
many cities in Germany. You can search by city, address, year, and surname.

http://adressbuecher.sachsendigital.de/en/home/

There are links to many other resources as well that are city or region-
specific.

For example, the link below takes you to an historical index of places
in Saxony:

https://hov.isgv.de/

The first two links of the interactive map below only works when the German
(DE) language is selected. Once you select the region and time period, you
will get a list of surnames you can search for. The third page is in
English or German.

http://adressbuecher.sachsendigital.de/tour/

There are many other collections and databases stored on the SLUB website.
I just learned about this website today >from my wife's second cousin
in Leipzig.

Teven Laxer teven.laxer@...