Jesaja Beek was one of the seven children of Izaak Leon Beek and Matje Mok. His father Izaak was already widowed since 1927 and he himself he passed away in 1935 and was interred in the Jewish Cemetery at Muiderberg.
Jesaja Beek was a commercial agent and pollster and married 30 May 1917 in Amsterda…
In addition, a Jokos file (number 1365) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.