Lida, David. Sod Hashem [compendium for a Mohel with prayers for the circumcision ceremony]

An important historical record for German-Jewish genealogy, especially for the community of Potsdam The inscriptions are in a number of different Aschkenazic hands. Apparently the father, grandfather and other family members recorded the births of their children, some entries state only the date of birth while others record the date of circumcision. Final leaves include records of births and deaths of other family-members, including daughters and wives written in various Hebrew and German scripts. Families mentioned are Eigel, Hamburg, Prager, Ehrlich, Elkes, Herfuth, Levy, Terschtitzel, Breslau, Casper, Heimann, Hirschberg. Potsdam is now the capital city of the newly re-established state of Brandenburg, southwest of Berlin. The first Jew residing in Potsdam is recorded in a document dated 1690. The establishment of an official Jewish community dates from 1730, when David Hirsch Prager received special letters of protection to establish silk and velvet factories in Potsdam. This ledger contains names of various members of the Prager family. It is interesting to note that the first official community synagogue was dedicated in 1767, the year the records of this ledger begin