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 h…