Sadhbh MacCarthy
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Family
About
Sadhbh MacCarthy married Dermod O'Brien. The MacCarthys and the O'Briens divided Munster between them and spent five hundred years disputing the division, which did not stop them marrying one another regularly.
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.): SADHBH, dau. of TEIGE MACCARTHY MOR, PRINCE OF DESMOND (the MacCarthy Mor / Eoghanacht kings of south Munster - note-only, extendable); wife of Dermod O'Brien; mother of Turlogh (our line) - an early MacCarthy-into-O'Brien royal marriage. Direct ancestress. Added 23 Jul 2026.