In the city address book of the city of Coburg from 1937, the following entry can be found: Kahn, Sally, merchant, Darmhandlung, Mohrenstraße 7b.

In the Regensburg address book 1903 the following entry is found: Jonas Hahn, scrap iron and broken metal en gros und en detail, Weißgerbergraben 7.

The Niedermayer brothers were owners of a private bank in Regensburg. Listed in the 1903 Regensburg address book as Bankgeschäft Josef und Leopold Niedermayer, Ludwigstraße 8.

Entry in the address book Regensburg 1903 - banking business Dr. Hugo Thalmessinger and August Strauß, cheerful Türkenstraße 1

1904 - Conversion after marriage to the Catholic Viennese actress Catharina Schwarz

In 1730, the Aldingen local lord Georg Wolf von Kaltenthal accepts the first two Schutzjuden (Abraham and Mazam Kahn) and assigns them the old parsonage near the Margarethenkirche as their home. In the attic of the parsonage, the two Jews set up a prayer room, which was probably used as a religious meeting place by the Jewish community of Aldingen until 1798 (purchase of the house at Kirchstraße 15 and conversion into a synagogue)

The Jewish community acquired a building site in 1825 and built a house with a mikveh (Jewish ritual bath) by 1826. In the purchase contract the community had secured itself: The contract could be canceled if no water was found "at a usable depth" within 30 days, which was apparently the case. In 1832 a stove was purchased to heat the water. On the second floor there was a baking oven, in which the Jewish community probably made matzos. In the building today, due to alterations, no traces of the mikvah can be traced.