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.

Alfred Traub was born in Berlin on July 7, 1904, the son of master tailor Ferdinand Efraim Traub and his wife Roza, née Schmidl.

Martin Toeplitz was born in Krone an der Brahe on May 24, 1886, the son of the Privy Councilor of the Institute Oskar Toeplitz and his wife Eveline (Lina) née Frankenstein.