Mietje Arpels was a daughter of Salomon Arpels and Rebecca Polak. She was a seamstress in a garment factory. She married Meijer Polak in Amsterdam on 1 April 1942, a son of Abraham Polak and Femmina Caransa. She lived separately from her newly wed husband, at the addresses of their own parents. On 7 September 1942, Mietje Arpels was deported from Westerbork to Auschwitz, where she on 10 September 1942 has been killed.
City Archive of Amsterdam, archive cards of Mietje Arpels, Meijer Polak; File cabineet of the Jewish Council of Amsterdam, record of Mietje Polak-Arpels.