Marie Hakker, daughter of Salomon Hakker and Grietje Porets, was born into a family of four daughters. She was unmarried and she was an apothecary assistant of profession. She has been deported togehter with her parents and killed in the Shoah, just as her sister Ester, who was married to Joseph Koekoek. Two other sisters have survived the Holocaust.
Municipal Archive of Den Haag, family registration card of Salomon Hakker from the People’s Registry of Den Haag and an addition of a visitor of the website.