I also immediately jumped to the conclusion that Martha married next door neighbor John. Then when I dug a little deeper I figured it couldn't be. Just the age is the first clue. I think all these people just blindly copied the first one to make that mistake without even the slightest bit of investigation. As an aside, either John or Martha seem to have had some imagination with respect to children's names - Mary Morgana, Vandilla, Cedelia. Vandilla even named one of her daughters Vandilla. Her husband was Martin van der Karr. Probably some interesting story there.