Lafracoth O'Brien

• Name	Lafracoth O'Brien  [1]
  Gender	Female
  Person ID	I33	O'Brien Genealogy
  Last Modified	22 May 2026

  
  

  Father	Murtaugh O'Brien, High King of Ireland,   b. Abt. 1050   d. Abt. 10 Mar 1119 (Age 69 years)
  Mother	Derb Forgaill ingen Lethlobair
  Family ID	F17	Group Sheet  |  Family Chart

  
  

  Family	Arnulf de Montgomery
  Family ID	F19	Group Sheet  |  Family Chart
  Last Modified	22 May 2026

  
  

• Sources

  [S4] Wikipedia Contributors, Wikipedia: The Free Encyclopedia, "Muirchertach Ua Briain," https://en.wikipedia.org/wiki/Muirchertach_Ua_Briain, (San Francisco, CA: Wikimedia Foundation, Inc.).