Jansje Waas was a daughter of Sander Waas and Eva Slap. She married 17 February 1937 in Amsterdam to Jesaja Veffer, a son of Gompel Veffer and Debora Blog. The couple had one daughter in 1937: Debora.
Her husband Jesaja has survived the war.
Jansje had eight siblings, of whom four have been killed …
In addition, a Jokos file (number 2388) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.