Mark Dassi, a musician, was married to Elisabeth van der Ster. They attended the wedding of their daughter Polly Judik Dassi to Jacques Theeboom. The marriage was performed at Westerbork transit camp on 1 October 1943. The parents signed the marriage certificate.
Record of marriage certificates of the Westerbork municipality, currently at the archives of Gemeente Midden-Drenthe in Beilen
In addition, a Jokos file (number 60492) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.