Hover over photo for color.
On the left is Kors van der Veer and his wife Helena Berendina Jansz with 2 of their children. On the right is Mariette's grandmother Henriette Louise Jansz and her grandfather Willem Marius van der Veer. I think that the girl on the right is their daughter Maria van der Veer. The 2 bothers, van der Veer, were married to 2 sisters Jansz.