This is not of much help to your direct question (I too have been unable to make much progress upstream) but I am a direct descendant of a John Jones (birth date and place unknown), who married Mary Beddo(w)es at Ditton Priors 09 Oct 1827. They had a son, William, who was baptised in Ditton Priors 13 March 1828. He was my 2nd great grandfather and, as far as I know, had no siblings. If nothing else, this may help you eliminate one line of enquiry.
I thought that the fact that William had a career as a schoolmaster, as did one of his sons (also William) may give some clues. Sadly, it did not and I was unable to find any definitive connections to be able to identify Mary's husband, John Jones. I have also been unable to track what became of John and Mary. My only tangible records for both of them are the marriage record and the baptism reference. I have also been unable to source Mary Beddow(e)s' background. There is a William Jones in the 1841 census living in Ditton Priors but he is not in any family group and I could not find any death records for his parents between 1828 and 1841.
Clive