Muireadhach mac Carthaigh Eóganacht Chaisil

✓ Muireadhach son of Carthach, king of Eóganacht Chaisil, d. 1092. AI 1092.7: 'Muiredach son of Carthach, king of Eóganacht Caisil, died'; AFM 1092.15 'Muireadhach Mac Carthaigh, lord of Eoghanacht, died' (his brother Donnchadh, also styled king of Eóganacht Chaisil, was slain the same year by Ceallachán Ua Ceallacháin). The first generation to bear 'Mac Carthaigh' as a surname. Father of Tadhg (king of Cashel, d. 1124) and Cormac (k. 1138, our line) - AFM 1138.5 'Cormac, son of Muireadhach, son of Carthach'. Wife not recorded. Sources read 26 Oct 2026: Annals of Inisfallen (Mac Airt ed.), CELT T100004; Mac Carthaigh's Book (Miscellaneous Irish Annals, Ó hInnse ed. 1947), CELT T100013; Annals of the Four Masters (O'Donovan ed.), CELT T100005B. [DIRECT ANCESTOR OF THE COMPILER: flag added 26 Oct 2026 by walking the tree from Aynsley, so that this marker is reliable and can be searched.]