Thing about the Irish peasants identifying with their former aristocracy is less clear-cut than in other countries. When the land grants were made to Elizabeth's or Cromwell's loyal soldiers, the Irish aristocrats who had owned the land often returned to work the same land as landless peasants, and their descendants were still there, waiting patiently, hundreds of years later.
I have a friend whose grandmother or great-grandmother still kept, in their tin shack, the 16th-century deeds to most of the neighbourhood land. And the local people all came to this bone-poor family for any help or negotiation they needed.
Incidentally, there's a good pipe version of Sean O Duibhir a'Ghleanna on the CD Out to an Other Side by Liam O'Flynn.
The song is immensely long in Irish, but it's commonly available, so I won't type it out.