Saartje Springer, a daughter of Samson Springer and Betje Levij, married Isaac Koopman in Amsterdam on 4 December 1913, a son of Emanuel Koopman and Schoontje Levij. website www.wiewaswie.nl.
In addition, Jokos files (numbers 35173, 8098) on this family or other family members are at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.