Thanks very much for those look-ups. I don't know if any of them are related to "my" John and Charles, but at least now I have some names to try to track down. Since there are no "Richards" in my tree, I'll focus on Robert and the surgeons. I'm new to researching N. Irish ancestry, so any advice you might have would be much appreciated (e.g. birth and marriage records for those townlands that could be evidence of a family relationship).