The building at Heckelbeckstr. 1 belonged to Josef Hayum (born 6.11.1863 in Trier) and his wife Flora, née Sternberg (born 10.1.1865 in Westerburg). They lived there from 1898 onwards in varying constellations with their five children Ella, Rosa (born 11.7.1896 in Brotdorf), Julius (born 23.1.1898 in Kirchlinde), Johanna (born 9.12.1900 in Kirchlinde) and Isidor (born 29.1.1905 in Kirchlinde) and their families, as well as foster child Julius Sternberg (born 12.3.1907 in Kirchlinde), a nephew of Flora Hayum.

Flora Hayum, the mother, died on 13.10.1940 of a heart condition.

Daughter Ella married Heinrich Daniel, a greengroce, in 1924, and four years later, their daughter Hannelore was born in Haltern. The family lived there until 27 July 1939, when they moved into the home of Ella Daniel’s parents at Heckelbeckstr. 1 in Dortmund.
All three were deported on 30 July 1942 to Theresienstadt, from where they were sent to Auschwitz on 9 October 1944. They are all three presumed to have died there. They were officially declared dead with effect as of 31.12.1945.

Rosa Hayum lived in the parental home up to 1942. Her brother Julius Hayum was a shopkeeper, like his father. Until the business was shut down by official order in early 1939, he kept a manufactured goods and special grocery store on the parental property. He was married to Hulda Jenny, née Salm.
On 30 April 1942, all three were deported to Zamość, where all subsequent trace of them is lost. They were officially declared dead by Dormund Local Court with effect as of 8 May 1945.

Johanna Rosenberg, née Hayum, was married to the Jewish teacher Sally Rosenberg (born 2.6.1893 in Langenschwalbach). They also lived in the Hayum household. The Rosenbergs were divorced in September 1934. Johanna subsequently left the parental home several times, but also regularly returned. In July 1937, she moved to Düsseldorf. Her last known address in Germany was Dasselstr. 63 in Cologne. From there, she was deported on the first transport from Cologne on 22 November 1941 to the ghetto in Łódź. On 5 May 1942, she was transported from there to Chełmno extermination camp, where she was murdered.

Isidor Hayum left the parental home already in 1933. His last place of residence in Germany was presumably Siegburg. He reportedly deregistered from there on 20.3.1939, with destination Antwerp. On 15 January 1944, he was deported from the SS transit camp in Mechelen, Belgium, to Auschwitz. Isidor was murdered on 12.4.1944 in Auschwitz-Monowitz.

Father Josef Hayum was deported to Theresienstadt together with his daughter Ella and her family. There, he was liberated in May 1945 and presumably returned to Dortmund before emigrating to America.

Julius Sternberg, the foster son, felt compelled to emigrate as early as 1934, because he found himself subjected to considerable persecution not only as a Jew, but also as a member of the SPD (Social Democratic Party) and the Reichsbanner (an organization formed to defend parliamentary democracy and the constitution). He lived until 1947 in Belgium, and then emigrated to the USA. In 1979, he paid a visit to his former home town with his wife.