[2] The first written records of his family date back to 1832, when his great-grandfather moved to Osijek from Warsaw, Poland.
Herman's great-grandfather was a merchant who owned a trade business "S. Weiss & D. Herrmann" in Osijek district Donji grad.
[4] In the 2nd assembly of Sabor, Herman was elected to fill a minority quota as a Jewish representative, in the Croatian Social Liberal Party (HSLS) electoral list.
[5] In the 4th assembly of Sabor, Herman was a member of the HSLS, and after that the Party of Liberal Democrats (LIBRA).
[2] In the 5th assembly of Sabor, he was a member of LIBRA, then of HNS-LD, and in 2005 he joined the Slavonia-Baranja Croatian Party.