Kaatje Cosman was a daughter of Aaron Cosman and Betje Hilversum.
She was married to Levie Bierschenk in 1906 in Rotterdam and had nine children. Two of them, Aaltje and Abraham, did not survive the war.
Addition of a visitor of the website
At a certain moment Kaatje Bierschenk-Cosman lived with her son at 5a Bleiswijkstraat.
Addition of a visitor of the website
In addition, a Jokos file (number 36083) on this household is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.