Jacob Hilversum was married to Vrouwtje Wertheijm. The couple had an unmarried son Nathan. Jacob Hilversum was a merchant.
K. Ribbens, Zullen we nog terugkeren
. De jodenvervolging in Amersfoort tijdens de Tweede Wereldoorlog (Amersfoort 2002) 164-165, 174-175
In addition, a Jokos file (number 8643) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.