I was doing research when I posted. It took me 11 years to get my Stiles traced to the Mayflower (and join the Descendants of the Mayflower Society, main Headquarters in Plymouth MA which I finished up) and I am sure you know that usually this takes time if there is something to find, I agree also.
I did not say that I had completed my old Irish book results, just starting on that and you seem to be backing what you say on your DNA test results? Other than that, I don't know what you are basing your "positive" knowledge on. Is this a result of DNA results?
The King of Leinster is listed in what you sent from O'Harts. Other than that, my source is Dick Weadock, and family "story".You saw his post, that is what I base it on.
This is not a quick and dirty or an exact science always. But you have results for the DNA? What did your test say?