Hermann Blum was born in Borken, Hesse, on February 1, 1892, the son of the merchant Joseph Blum and his wife Amalie, nèe Haas. In October 1920 he married Selma Blum, née Steinfeld,  with whom he had  two daughters - Hilde (*1923) and Marga (Martha) (*1928), who were also born in Borken. In the 1930s the family (also) seems to have lived in Oberhof/ Thuringia. Possibly, Hermann Blum worked in the renowned Hotel Blum there. It couldn’t be found out if there was any kinship relationship there. 

After the Aryanization of the hotel in April 1938, Hermann Blum and his wife moved to Bad Kissingen for a short time. Hermann Blum was first employed in Bella Regensburger Sanatorium, from the middle of July he worked as a kitchen help in Apolant Sanatorium, on September 24, 1938 he left the Frankonian spa again and signed out for Niederfell/ Moselle.

The family's last place of residence before deportation was Leipzig. Hermann Blum and his wife had lived here since 1939. On January 21, 1942, Hermann Blum, his wife and two daughters were deported from there to the Riga ghetto. At the beginning of November 1943, Hermann was deported to Auschwitz and murdered in the same month. His wife and daughters were deported to the Stutthof camp in October 1944 and died there.