Marie Miriam Benedik was born in Vienna on June 23, 1908, the daughter of David Benedik and his wife Rosalia, née Schwarcz. Her siblings were Alexander, Robert, Judith, Margit and Franziska.

Bertha Baruch was born on April 27, 1861 in Alt Kriewen / Lyck / East Prussia to Jewish parents.

Hannchen Gumpel was born on March 14, 1870 in Pudewitz/Posen into a Jewish family.