Dina Jeannette de Jong was a daughter of Abraham de Jong and Julie Waterman, who was divorced from her father on 1 September 1933 and who passed away as spouse of Abraham Pachter on 7 September 1939.
City Archive of Amsterdam, archive cards of Abraham Pachter and Abraham de Jong .
In addition, a Jokos file (number 2667) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.