FAILBE Mugain

Abt 0650 - 0715  (65 years)

• Name	FAILBE Mugain
  Birth	Abt 0650	Leinster, Ireland
  Gender	Female
  Death	0715	Ireland
  Notes	Mugain, daughter of Failbe mac Domnaill meic Cormaic meic Díarmata of the Uí Bairrche and Eithne, daughter of Crundmáel mac Rónaín[1] In the seventh century, a King of Uí Bairrche was Suibne mac Domnaill (grandson of Cormac mac Diarmata). In the Life of Munnu of Taghmon ( 635 AD), it would appear that he controlled the area of Leighlin at the time of the synod over the ordering of Easter (630 AD). It is stated that Munnu, as a result of being insulted by Suibne, prophesised that his head would be cut off by his brother’s son (Cind Faílad?) and would be thrown into the Barrow, near the Blathach stream (Madlin River?). His brother Faílbe married Eithne daughter of Crundmael mac Rónáin ( 656 AD) king of Uí Cheinnselaig and Lagen Desgabair (South Leinster) and Mugain, the daughter of Faílbe, married Cellaig Cualand, King of Leinster ( 715 AD) from whom are the Uí Cellaig Cualand. There is an entry in the Annals of Ulster recording the death in 766 AD Cernach son of Flann who is also thought to be of this line.[2] Name Name: Mugain /ingen Failbe/ Sources ↑ T. M. Charles-Edwards, Early Christian Ireland, p. 94, retrieved 2014-06-23, amb ↑ Uí Bairrche, traceyclann.com, retrieved 2014-06-23, amb T. M. Charles-Edwards, Early Christian Ireland. Edition illustrated, reprint. Publisher Cambridge University Press, 2000 Do it Anmann Uí Bairrche, traceyclann.com, taken from Rawlinson B502, Book of Leinster, Book of Lecan, Book of Ballymote, hagiography and the Annals. This person was created through the import of LJ Pellman Consolidated Family_2011-03-21.ged on 21 March 2011. This person was created through the import of David Rentschler Family Tree_2010-09-30.ged on 01 October 2010. Source S48: Author: Ancestry.com: Title: Public Member Trees: Publication: Name: Ancestry.com Operations Inc; Location: Provo, UT, USA; Date:2006;
  Person ID	I58465	Freeman-Smith
  Last Modified	27 Jan 2026

  
  

  Father	DOMNAILL Failbe,   b. Abt 0600, Dublin, Ireland d. Ireland
  Relationship	natural
  Mother	CRUNDMAEL Ethne,   b. Abt 0625, Ireland d. Ireland
  Relationship	natural
  Family ID	F26069	Group Sheet  |  Family Chart

  
  

  Family	mac GERTHIDE Cellach Cualann,   b. Abt 0630, Leinster, Ireland d. Abt 0715, Ireland (Age 85 years)
  Children	1. CUALAIN Conchenn Ingen,   b. Abt 0668, Dublin, Ireland d. 0743, Ireland (Age 75 years)  [Father: natural]  [Mother: natural]
  Family ID	F26068	Group Sheet  |  Family Chart
  Last Modified	27 Jan 2026