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 30050) on this household is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods…
Abraham is een zoon van Jacob Isaac Nijburg (A'dam, 11 maart 1842) en Mirjam Nijburg. Hij was niet gehuwd.
bron SAA archiefkaart Abraham Nijburg 23-9-1870