His dates of birth and death, as well as his relationship to Isidor and Hermine are taken from a member's tree on ancestry.com. However, Siegmund reported the death of Heimann who would be his brother if the relationship is correct. The address he gives on Heimann's death certificate is Breslau, Gartenstrasse 73; in the Breslau synagogue community address list (ca 1930) his daughters Gertrud and Anni are listed at this address.