Jacob van West was a son of David van West and Keetje Cohen. He married in Amsterdam on 19 May 1920 to Judith Gobets a daughter of Jacob Gobets and Betje Barend.
City Archive of Amsterdam, archive card of Jacob van West and Jacob Gobets .
In addition, a Jokos file (number 20826) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.