Yes I realise no native place was mentioned. but I think no-one is going to travel far in those days. Sarah Ross was from Armagh and the people living at the Rocks tended to live with people from the same part of Ireland they themselves came from. If this is so then I am thinking he may have c ome from Armagh or Newry.
On the contrary- I've seen lots of instances where people were tried quite a distance from where they lived.
Not sure what the first sentence means- "according to most historians the people living at the Rocks tended to live with people from the same part of Ireland they themselves came from. i was thinking that was the same with the Irish here in SA ...they tended to marry people from the same county they came from, if they had the choice. "
Sometimes people married others that had come from the same area but sometimes not so you can't really assume. They did often marry (at least in the first generation) someone of their own religion but even then not always.
The problem with finding the name in Louth might just be the scarcity of records at such an early period.