Johan married le Coultre Margaretha on 15 Feb 1922 in Naarden. Margaretha (daughter of le Coultre Jan Arie and Sijtsma Maria Alida Margaretha) was born on 30 Mar 1899 in Edam; died in January 9, 1947 in Enkhuizen. [Group Sheet] [Family Chart]

1. Koolhoven NN
2. Koolhoven NN