ISO my maternal grandfather's family. Alfred Adolph Ganz b. 20 Jan 1889 at Lodz. Parents: Bertha Aurelia Fischer, b. 9 Sept 1866 and Friedrich Armin Ganz b. 15 April 1852 in Germany. Bertha's sister, Melida Amalie Fischer b. 16 March 1878 emigrated with Armin and Bertha in August 1892.
The parents of Bertha and Melida we think are Karl/Carl Ludwig Fischer and Charlotte von Gelbke, but this is not verified. We also believe there were other siblings, possibly male.
Does anyone know a good source for researching additional data at Lodz?