The McGillycuddy of The Reeks has passed.
Yeah, I didn't know what that meant either.
It's actually an obituary for a person of rather formidable ancestry. Alas, when one has the blood of Gaelic chieftains coursing through one's veins, modern-day life can be problematic. Or as The Telegraph puts it, "Although he could be charming in the appropriate company, he did not relate well to Irish people outside his own class."