Few details appear to be known of him, he being the first of the family to appear in the annals since the time of
Ruaidhri Ó Flaithbheartaigh.
He built the
church at
Annaghdown in 1410 - the
monastery of Annaghdown was burned in 1413 - and was succeeded by his son, Domnell.
Annalistic references
1384. A meeting, took place between O'Flaherty and O'Malley, but a quarrel arose between them, in which Owen O'Malley, Cormac O'Malley (i.e. Cormac Cruinn), and many others besides these, were slain by the people of O'Flaherty.
1396. Conor, the son of Owen O'Malley, went on an incursion with a ship's crew to West Connaught, and loaded the ship with the riches and prizes taken by that adventure. But all, save one man only, were drowned between Ireland and Aran.
1402. Brian, the son of Donnell O'Flaherty, heir to the lordship of Carn Gegach, died.
1407. Hugh O'Flaherty, Lord of West Connaught, died at an advanced age.