According to a google search I did, they do not list Margaret Maria Gouverneur, daughter of Staats Gouverneur and Isabella Bromwell Gouverneur as one of his children. I have a photo of her tombstone that is in the Maplewood Cemetery in Charlottesville, VA. I'd like to share it with members of the family. Margaret was born in 1868 and died in 1960.
I am researching Elizabeth Kortright Monroe, wife of President James Monroe. Her daughter married Samuel Gouverneur and her sister married into the Gouverneur family as well.