Cornelis married Neeltje Theunisdr van Muijlwijck, daughter of Theunis Huijgs van Muijlwijck and Willemijntje Willems Vlot, on 29 April 1759 in Lopik.25 (Neeltje Theunisdr van Muijlwijck was christened on 21 October 1736 in Meerkerk and was buried on 26 March 1772 in Lopik 127.) Cornelis also married Eijgje van den Berg on 2 January 1780 in Lopik.25 (Eijgje van den Berg was born in Soest 25,26.)