Louis Kraal and Marianne Barends had a son, Siegfried Kraal.
Stadsarchief Amsterdam, archiefkaart Siegfried Kraal
In addition, a Jokos file (number 11095) 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 bank (L-claim, number 11282 / 8579).