Bruno Wedel was born on March 3, 1892 in Stolp into a Jewish family.

Johanna Landsberg was born in Berlin on December 26, 1891, the daughter of the merchant Siegmund Landsberg and his wife Bertha, née Oppenheim.

Hermann Wechsler was born Hersu Avram (Hermann Abraham) Vecsler on December 27, 1887 in Botosani, Romania.

Therese Freund was born into a Jewish family in Neersen near Mönchengladbach on August 29, 1871.