Isaac Barend married Jetje Braasem in 1926 in Amsterdam. She died in 1934. They had three children: Frederika (who died at a young age) and the here mentioned Samuel and surviving child. Isaac married for a second time in 1935 in Amsterdam. He divorced in 1939. Isaac married for a third time on 11 December 1940 in Amsterdam to Elisabeth Koningswinter. They had a divorce on 28 October 1942.
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