Betty Thine Kamm was born on February 10, 1893, in Berlin-Köpenick, the daughter of the fourage dealer Heinrich Kamm and his wife Jenny, née Heckann.

Maria Leo (born 1873) was

Betty Blumenthal came into the world on February 11, 1870 in Treptow an der Rega/West Pomerania in a Jewish family. She became a dressmaker and married the non-Jewish Robert Lenz; a child was born to them who was not brought up in the Jewish faith. Her husband died as early as 1899. In the early 1940s, Betty Lenz lived for a few months as a subtenant at 39 Belziger Strasse in the two-room apartment of the musician Richard London. On January 21, 1943, Betty Lenz was deported to Theresienstadt,
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