Jacobus de Mots, born in Amersfoort circa 1887, son of Melis de Mots (overwegwachter) and Gerritje Kuyt, carpenter.

Jacobus was married in Amersfoort on December 16, 1914, at the age of approximately 27 to
Pietje van Kamp (aged 27 years), born in Amerongen on May 10, 1887, daughter of Evert van Kamp (coppersmith) and Aukje Keimpes Feenstra (maid servant).