Zoon van Hendrik Jan Knotters en Hendrikje Holsappel
(1) He is married to Alberdina Otman.
They got married on October 17, 1878 at Dalfsen , he was 22 years old.
(2) He is married to Gerrigje Timmerman.
They got married on March 10, 1894 at Dalfsen , he was 37 years old.Source 1
Gerrit Jan Knotters is weduwnaar van Alberdina Otman
Gerrigje Timmerman is weduwe van Evert Jan van der Werf