[Direct Linage1.FTW]
Note:
the 124th Monarch; and in the 8th year of his reign died a natural death at Tara, A.D. 365; leaving issue four sons, viz., by his first wife Mong Fionn: I. Brian; II. Fiachra; III. Olioll; IV. Fergus. And, by his second wife, Carthan Cais Dubh (or Cariona), daughter of the Celtic King of Britain, V. Niall Mór, commonly called "Niall of the Nine Hostages." Mong Fionn was dau. of Fiodhach, and sister of Crimthann, King of Munster, of the Heberian Sept, and successor of Eochaidh in the Monarchy. This Crimthann was
poisoned by his sister Mong Fionn, in hopes that Brian, her oldest son by Eochaidh, would succeed in the Monarchy. To avoid suspicion she herself drank of the same poisoned cupwhich she presented to her brother; but, notwithstanding that she lost her life by so doing, yet her expectations were not realized, for the said Brian and her other three sons by the said Eochaidh were laid aside (whether out of
horror of the mother's inhumanity in poisoning her brother, or otherwise, is not known), and the youngest son of Eochaidh, by Carthan Cais Dubh, was preferred to the Monarchy. I. Brian, from him were descended the Kings, nobility and gentry of Conacht Tirloch Mór O'Connor, the 121st, and Roderic O'Connor, the 183rd Monarch of Ireland. II. Fiachra's descendants gave their name to Tir-Fiachra
("Tireragh"), co. Sligo, and possessed also parts of co. Mayo. III. Olioll's descendants settled in Sligo in tir Oliolla (or Tirerill). This Fiachra had five sons: 1. Earc Cuilbhuide; 2. Breasal; 3. Conaire; 4. Feredach (or Dathi); and 5. Amhalgaidh.