Hi
Mark in 1851 is indexed as "Rudom" rather than "Prudom". I had to search for just the name Mark with no surname to find him.
I came across a newspaper report which mentioned a Weslyan meeting whcih had a Mr Prudom from Farndale. That was in 1869. So he was carrying on the Preaching.
Most of the instances of the name Prudom in the NBI are from the Danby area which is in Eskdale. I expect your lot probably came from there. All of these places are in the North Riding of Yorkshire and this is not really the right board.
Bryan
PS
I was thinking that the Tamar PRUDOM death in the Guisbro District may have been at Danby which is in that registration District.
However I found the burial in the NBIv2
Burial 25 Aug 1865 Tamar PRUDOM age 92, Guisbro, St Nicholas.
That makes her born c. 1772/73 and so, if she never married, could be the girl baptised Thamar PRUDDOM 7 Aug 1778 to Saml. PRUDDOM, Glaisdale, batch C007513.
Hard to believe that she could be a sister of John PRUDOM born about 30 years later but maybe John was son of a different wife.