Turlogh Mor O'Brien
1250 – 1306
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About
Turlogh Mor O'Brien, King of Thomond, ruled in the early fourteenth century and defended the lordship in the long wars against the de Clares, who had been granted his country by an English king who did not hold it.
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 (No.114), THE HERO OF MacGRATH'S 'WARS OF THOMOND' (Cathreim Thoirdhealbhaigh); d. at his residence Insi-an-Lasi 1306. m. 2nd Orflath (Aurnia), dau. of Donal Oge MacCarthy Mor - mother of Murtogh (our line). Direct ancestor.