In our Belgian file, it is possible to find:
He was in the business of wood for shipbuilding.
He received Letters of naturalisation between 1772 and 1774
In Mannheim, there was Abraham SINZHEIM who was a banker.
He married first Marguerite WEINHEIM then Sara LEVY in Metz in 1729.
I know 3 daughters but not Esther.
Abraham was the uncle of the Chief Rabbi of Alsace Joseph David SINZHEIM
then president of the Grand Sanhedrin of Napoleon in 1807.
Micheline Gutmann, Paris, France Web site GenAmi www.genami.org