Jacobus married Blommers Helena Sophia. Helena (daughter of Blommers Matthijs Hendrik and Jansen Jantje) was born on 12 Mar 1915 in Den Haag; died on 9 Dec 1954 in Soest. [Group Sheet]

Jacobus married Sietsema Grietje Petronella in >1954 in Soest. Grietje (daughter of Sietsema Wiebe and Rijzinga Anje) was born on 13 May 1912 in Appingedam; died on 10 Apr 2016 in Hilversum. [Group Sheet]