Lena de Groot was a daughter of Salomon de Groot and Naatje Arbeid. She lived at Rapenburgerstraat 106 III in Amsterdam but since 28 August 1941 at Ruyschstraat 105 II with Regina Arpels-Polak and her son Pierre, to whom she got married on 22 April 1942. On 30 September 1942 Lena and her newly wed husband were killed in Auschwitz.
City Archive of Amsterdam, archive cards of Lena de Groot and Pierre Arpels.