Zoon van Tobias Colvoort (wieldraaijer) en Janna Stork.
(1) He is married to Fenneken Linteler.
They got married
(2) He is married to Willemina Smeijers.
They got married on June 1, 1839 at Delden, he was 27 years old.Source 1
Grades Colvoort is weduwnaar van Fenneken Linteler; bruidegom ook Gerhardus Colvoort; vader bruidegom ook Tobias Kolvoort