Karl Schwarz had lived together with Netti Redisch. They had one child together that survived the war.
Karl Schwarz had a second child, Rachela.
Amsterdam Municipal Archives; record card of Karl Schwarz
In addition, a Jokos file (number 34880) on this person is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.