Albert Grünewald served as a reservist in the First World War and already died of pneumonia while still in military service. He died on 28 April 1917 in the Bethanien Hospital in Hörde, which at the time also served as a military hospital.

Son Erich already died in 1932.

Bertha Grünewald lived as a widow for many years at Hermannstr. 77 in Hörde. On 1 February 1941, she was ordered to move from there to the “Jew house” at Ludwigstr. 8. She was deported on 30 July 1942 from Dortmund to Theresienstadt. On 15 May 1944, she was taken from there to Auschwitz, where she was presumably murdered immediately after her arrival.

Son Karl moved with his mother to the “Jew house” at Ludwigstr. 8 in February 1941. On 8 April 1942, he married Edith, née Vogelsang, divorced Wolf. The wife brought a son named Dan, born 4.1.1942 in Dortmund, with her into the marriage. The former marriage of the then Edith Wolf was dissolved on 1 March 1942, which mean that she was able to marry Karl Grüneberg just 5 ½ weeks later.
The couple were then able to live together for a short time at Ludwigstr. 8. On 30 April 1942, they were all three deported to Zamość, where they were presumably murdered.

Descendants of Rudolf have related that the brothers Rudolf and Otto managed to escape to London in 1939.
An entry in the household register for Hermannstr. 77 records them as having left the address on 1 September 1939 (= start of the war), with Shanghai as their destination. The brothers had probably only been able to obtain entry visas for Shanghai and they changed their travel destination at short notice after leaving Germany, or they did indeed spend some time in Shanghai and only emigrated to the Great Britain after the war.