The mother of Otto, Robert and Herbert, Alice, volunteered during the war as a nurse for wounded soldiers. She was a member of the National Women’s Association of the Red Cross and worked at a private military hospital known as the “Kyffhäuser Hotel.” Her daughter, Helene, also worked voluntarily as a hospital orderly and radiographer in the Friedrichsheim Clinic in Frankfurt’s Niederrad district. Alice and Helene were awarded the Medallion for Voluntary Nursing for their service.