Turlogh Mor O'Brien
1009 – 1086
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About
Turlogh Mor O'Brien was King of Munster and one of the strongest of Brian Boru's successors, restoring much of the family's authority in the generations after Clontarf.
Research notes
✓ (O'Hart, Irish Pedigrees (1892), 'O'Brien (No.1) King of Thomond', gen. nos. as cited; corroborated by the Annals of the Four Masters and by the DC782/R-L226 O'Brien Y-DNA study (which independently numbers this same descent 105 Brian Boru -> 120 Turlogh Donn). Wired 23 Jul 2026.): TURLOGH MOR O'BRIEN, KING OF NORTH MUNSTER (Thomond) - took the kingship on the abdication of his great-uncle Donogh; d. 1086 aged 77. m. Mor, dau. of O'Hyne of Kilmacduagh, co. Galway. Father of Dermod (our line). (This is the Turlogh whom Burke's Inchiquin named as the point '13 generations above' Turlogh Donn - the gap O'Hart now fills.) Direct ancestor.