Hanna Tworoger came into the world on January 22, 1891 in Haideberg/Posen in a Jewish family.

Roza Schmidl was born in Budapest on February 26, 1874, the daughter of Heinrich Schmidl and his wife Eva, née Klein.

Ferdinand Efraim Traub came into the world on May 8, 1871 in Felsöjeszeno/Hungary in a Jewish family.