Interesting, Eric. Are you talking about mtDNA or Y-DNA. I don't know Irish history very well I'm afraid, but if the Spaniards came here with hostile intent then they probably would not have brought their women with them. If there were Scots emigrating or fleeing from Scotland then I would think it more likely that they would have brought women with them.
You might want to check IrishTimes and their maps of civil parishes. They give sort of a surname "density" count based on number of households with a particular surname in a particular parish at the time of Griffith's valuation. There seem to be a lot of Hegartys out of Castlehaven, for instance.
Susan J. Barretta
You might want to check IrishTimes and their maps of civil parishes. They give sort of a surname "density" count based on number of households with a particular surname in a particular parish at the time of Griffith's valuation. There seem to be a lot of Hegartys out of Castlehaven, for instance.
http://www.irishtimes.com/ancestor/browse/counties/civilmaps/
- Susan
Jan 16, 2010