Muitchertach Ua Tuathail King of Uí Muiredaig
- Born: 1080, Diocese of Meath, Ireland
- Marriage (1): Cacht Ua Mordha in 1113 in Lough Garmen, Wexford, Leinster, Ireland
- Marriage (2): Inghin O'Byrne
- Marriage (3): Inghin O'Byrne
- Died: 1164, Leinster, Ireland aged 84
FamilySearch ID: LB5L-3KM.
Muitchertach married Cacht Ua Mordha, daughter of Loígsig Ua Mórda, King of Laois and Gormlaith Ni Caellaide, in 1113 in Lough Garmen, Wexford, Leinster, Ireland. (Cacht Ua Mordha was born in 1085 in Dublin, Leinster, Ireland and died in 1150 in Ireland.)
Muitchertach next married Inghin O'Byrne. (Inghin O'Byrne was born in 1092 in .)
Muitchertach next married Inghin O'Byrne, daughter of Gillacomhall O'Toole and Sadbh Ní Domnail. (Inghin O'Byrne was born in 1094 in Ireland.)
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