The Book of Invasions lists many groups who came to Irish shores, the first three left only bones. A grand-daughter of Noah, the Parthalonians (sp?), and then the Nemedians.
Now the Nemedians are another matter perhaps, it is claimed that the Nemedians returned as both the Fir Bolg and the Tuatha de Danan and were sons of Nemed from Greece. Also an argument might be made that the Fomorians, seafarers from the north or Africa, or who knows (? (Phonecia?)) may have lived at times on Irish shores, it can also be said that their bones remained as they are reputed to have been involved in several notable battles with various Irish dwelling peoples. I wonder if the Fomor had more to do with things than just popping in to oppress from time to time and also who they might be.
Since Nemedians were the progenators of both the Fir Bolg and the De Danans one might class them as survivors if one accepted that the Milesians only drove them underground into the FaeRig mounds.
Legend and lore often focuses on the kings and their linege. If it is at all possible one might think about who the people were, the ones who carried the water and rounded up cattle and made the food that the champions feasted upon. In particular, without having read the Book of Invasions, the title suggests that someone was there to bear the successive waves of invasion, perhaps someones other than Tuan.
Well that’s a start and I really aught to fill more in, but there is little enough time except to say that Niall of the Nine Hostages (yes yes, I’m back to that) is an excellent illustration of what I’m going on about. Niall, was Irish, well, half so. Niall’s father was Eochaid Mugmedon, but his mother was a Saxon princess. That makes his blood half Saxon. But I would submit that what really made Niall Irish was not his father, but the druid who saved his life and raised him.
Much later Normans would come to conquer Ireland, again the rulers changed, but it is funny. I’ve heard it said that the Norman lords became more Irish than the Irish themselves. Is it because, irrespective of the ruler, the people stay pretty much the same?