Greg, I would be the Joughin researcher that Sue Pedersen mentions.
The Christchurch Joughins came from a farm called Ballakew, near St. Mark’s church in Malew parish. That is in the south of the Island. Before that, like most Joughins, they came from the north. This family was in Keilthusthag in Andreas, and before that in Cronkbane on the east coast of Bride.
There is plenty more that I can tell you, but we can do this by e-mail. Please could you write to me at pjallen@btinternet.com. If you are Gregory Peter Joughin, I can fit you onto the family tree. If you are not, I would be interested in hearing from you anyway.