So Stephen Walker Fitts (your great grandfather) was William Walker Fitts' brother? And Stephen's daughter was your grandmother? Is that correct? OK. Whether or not I have that exactly right is not as important as recognizing that you and my husband (and you and my father-in-law) are cousins of some variety.
I have some background information that I would be happy to share if you will provide an email address or email me at lelliott19@aol.com