Genomic History of Ireland
Genetic information supports significant migration to Ireland from the Middle East and from farther east and north east. Migration from the Middle East probably relates to the Bronze Age and migration from the far north east probably relates to the Iron Age. So we can probably agree that ideas were brought by migration and that Irish population is in significant numbers are from what we could call Syria and perhaps a bit east of Ukrainian. Perhaps before these definitive migration, there was significant inbreeding among cultural elites on the Island.
We are learning a lot and have a lot to learn.
Richard C. Sheehan