Daniel de Jong was a son of Eliza de Jong and Ester Rijnveld. He married in Amsterdam on 15 May 1913 to Marie Roozendaal, from whom he has been divorced there on 6 March 1926. With her he had two children: Ella and Bernard.
On 2 September 1926, Daniel remarried in Amsterdam to Judith Pezarro, daughter of Eliezer Peazrro and Esther de Miranda.
City Archive of Amsterdam, archive cards of Daniel de …