William Hall married Lucy Jordan in the early 1840s. Lucy had previously been married to a William Derryfield/Derifield, and at least two of Henry Hall's siblings you've listed are from that previous marriage (David and Fanny, a.k.a. Frances). To complicate matters even further, it's possible that William Hall may have been married to someone before Lucy Jordan. He and this wife are probably the unnamed couple living in the home of John Hall (prob. father of William) in the 1840 Russell Co. census, and it appears they've got three children at that time (one being the Enoch Hall who shows up in the 1850 census in William and Lucy's household). William's mother is probably the Nancy Hall living with his family in the 1860 census. I'd be very interested in learning whether the Lucy or the Nancy Fleming you've got as Henry's sisters is one of the unnamed daughters of William on the 1840 census, when she would have been about 15.