Jansje Vreeland was a daughter of Izak Vreeland and Mina Ossendrijver. She married in Antwerp (Belgium) on 7 July 1914 to Jacob Porcelijn, a son of Hartog Porcelijn and Rachel Vischjager.
City Archive of Amsterdam, archive card of Jacob Porcelijn .
In addition, a Jokos file (number 20922) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.