I am very interested to hear more about James Iles' father-in-law's siblings, your antecedent Mary Hall and her brother Christopher, whose will you have (according to a post of yours in another thread).
The other common piece of information that I have which is aligning with yours is that the line goes through a Mr Hall of Whenby. I don't have any documentary support for the mention of this in my family papers but I see that you have obtained a latin entry that appears to reference Christopher Hall's baptism in 1695. The date is perfectly consistent with Edward Hall, my gggg-grandfather having been born in 1731 - a date which I can corroborate from a biographical record of his death "in his 85th year" in 1816.
Edward