Authorities O'Reilly and O'Curry considered that he was Abbot of Boyle Abbey, County Roscommon, Ireland.
Donnchadh Mór settled at Finnyvara (or Finavara) in the Burren region of County Clare, Ireland.
The Ó Dálaighs occupied a rock seat nearby termed the 'Brehon's Chair' used for open air courts in ancient times and they may be buried in the mound below the monument.
[3] + A Bardic Miscellany: Five Hundred Bardic poems from manuscripts in Irish and British libraries, edited by Damian McManus and Eoghan Ó Raghallaigh, Trinity Irish Studies, Dublin, 2010.
In the introduction to The Tribes of Ireland by Aonghus Ruadh na nAor Ó Dálaigh, the editors give the following family tree.