My husband is descended from Martha's sister, Sarah. The post from blarneycastle has the basics right, except I only have five children for Martha and Thomas.
Martha is mentioned in a lot of books about the Salem Trials. I can help you with her genealogy, if that is what you are looking for.
Including the fact that Martha's mother, Faith Ingalls, is related to Laura Ingalls Wilder of Little House fame. My daughter was more excited about that than if we were related to royalty!