On 26 February 1814 King William I decreed that the Nederlandsch Israëlitisch Seminarium (NIS) was to be established in Amsterdam to train rabbis, teachers and other officers serving the Jewish community.
Gabriel Duizend, the son of Joseph, attended the NIS.
In addition, a Jokos file (number 12909) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.The Jokos file reveals that a claim was lodged for compensation for valuables surrendered to the Lippmann-Rosenthal looting …