Eduard Urmann was born in Czernowitz on July 23, 1883, the son of Israel Traub and Freide Urmann.

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.