I've followed this thread with interest I would agree with what has been suggested about who married whom as far as the Janes'go. I am descended from John (Jury) Arnold's daughter Anna Arnold Jewry who was christened in Monkleigh on 13 FEB 1825. She married a John Parr (using the name Arnold) on 16 Jan 1844 at the Register Office in Bideford. Interestingly one of the witnesses is a Ann Hookway.
I have to a degree become stuck at this point, since it seems likely that John Jury's father was an Arnold probably a John but back from then i'm not sure. Ann Berman is also a sticking point as I can see some Bermans around in Devon in the 1840's and 50's, but I had wondered if actually it could have been Berriman, Burman, Beerman etc but not really come up with any candidates.
Another fact to add to the mix is that John Jury is likely to have a brother William who was Christened In Ashreigney as William Jury mother Hannah in 1805