David Manus Ensel married Keetje Presser in Amsterdam on 17 July 1942, a daughter of Levie Presser and Rachel Visser. City Archive of Amsterdam, archive card of Keetje Presser and David Manus Ensel.
In addition, a Jokos file (number 31657) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.