As far as who William's parents were,pure conjecture at this time. William's first born son was James Samuel TIDWELL, and a James Samuel TIDWELL and Lucy MASSENGALE were married in Marshall County in 1838 and had a son William in 1840. Perhaps a coincidence in the Samuel James name. However, when William Baxter TIDWELL applied for inclusion on the Indian tribal rolls in the Indian territory of Oklahoma (he was denied), he listed his father's name as James. sounds pretty convincing.
Sure hope you an fill in any other info on the family. Dave