According to tradition Mozes Bamberg was in America at the start of the war. He came back because he was worried about his sisters, among whom the here mentioned Judith. Addition of a visitor of the website
These persons are listed as residing at the same address. The source does not provide information about how they were related to one another.
In addition, a Jokos file (number 54354) on this household is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.