Philip Cohen and Sientje Staal married in 1931 in Amsterdam.
Stadsarchief Amsterdam, archiefkaart Sientje Staal
Sientje Cohen-Staal took her own life under pressure of the circumstances.
NIOD, Records Joodse Raad, box 36d, letter d.d. 14 January 1943
In addition, a Jokos file (number 30898) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.