Martin Schmidt was born on January 7, 1870 in Schönlanke/Czarnikau County, the son of Wilhelm Schmidt and his wife Flora née Rosenberg. He married in 1906 first Hedwig Szamatulski,

Wolf Mehler was born in Zrodla/Galicia on January 5, 1887, into a Jewish family.

Elsbeth Haberkorn was born in Breslau on September 22, 1878, into a Jewish family; she had a sister Alice.

Regina Rahel Stahl was born on December 3, 1891, in Kolomea, Galicia, into a Jewish family.