She was the daughter of Reikel/Rahel Grünberg Engers(*11.09.1879 Papenburg- murded 29.Jan.1943 Auschwitz), widow of Max Grünberg (*01.06.1876-d.02.10.1938 Bokel). Barta's sister Sofie Grünberg (30.12.1912 Bokel) was murdered together with her mother. The youngest of the three siblings, Leo (*28.06.1920 Bokel) could escape from Hamburg to Sweden and emigrated to New Jersey/USA after 1945. Berta had lived in Osnabrück before moving to Groningen.
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