Mong Finn Nicfideach O'Hailill
340 - Yes, date unknown-
Name Mong Finn Nicfideach O'Hailill Relationship 
with Kathleen Alice Jones-Rouse Birth 340 Gender Female Stories and Notes - Mong Fionn was daughter 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 eldest son by Eochaidh, would succeed in the Monarchy. To avoid suspicion she herself drank of the same poisoned cup which she presented to her brother; but, notwiths tanding 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 o therwise, is not known), and the youngest son of Eochaidh, by Carthan Cais Dubh, was preferred to the Monarchy.
To Lady Kathleen Great GrandParent Death Yes, date unknown Person ID I4399 Enchanted Family Tree Last Modified 14 Mar 2012
Father Fideach Macdaire O'Hailill, b. 300 d. Yes, date unknown Family ID F2491 Group Sheet | Family Chart
Family King of Ireland Eochaid Mugmadon, b. 305 d. 365, Tara, Offaly, Leinster, Ireland 
(Age 60 years) Children + 1. Brian, of Connacht, b. 372 d. Yes, date unknown 2. Fiachra 3. Olioll 4. Fergus Family ID F2459 Group Sheet | Family Chart Last Modified 14 Mar 2012
- Mong Fionn was daughter of Fiodhach, and sister of Crimthann, King of Munster, of the Heberian Sept, and successor of Eochaidh in the Monarchy.