Jacob de Magtige was a son of Elkan de Magtige and Hadasse Sanders. He married 28 January 1931 to Jetje Vuisje, a daughter of Abraham Vuisje and Roosje Bilderbeek. website www.wiewaswie.nl.
In addition, a Jokos file (number 55290) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.