Jeanne de Leeuw was a daughter of Daniel Hendrik de Leeuw and Anna van Collem. She married Elias d'Ancona in 1939. Stadsarchief Amsterdam, archiefkaart Daniel Hendrik de Leeuw
In addition, a Jokos file (number 13605) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.