Siegfried Goudeket was one of the first Jewish boys who was picked up during a raid in Amsterdam. Siegfried was murdered in Buchenwald. After an intensive correspondence with the German authorities, Isaac Goudeket could place the ashes of Siegfried in crematorium Westerveld.
A part of this correspondence one can find in part 1 of J. Presser Ondergang: de vervolging en verdelging van het Nederlands…

In addition, a Jokos file (number 18621) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.