Cormac Mac Carthaigh King of Munster

✓ Cormac Mac Carthaigh (Cormac 'Muighe Thamhnach'), King of Desmond from 1123 and of all Munster; builder of Cormac's Chapel on the Rock of Cashel (consecrated 1134). AI 1123.6: 'A grave malady afflicted Tadc, son of Mac Carthaig, and Cormac, his brother, took the kingship of Desmumu'; AI 1127.2 deposed, entered Lismore, restored by the Uí Briain the same year. AFM 1138.5: 'Cormac, son of Muireadhach, son of Carthach, King of Desmond, and Bishop of the kings of Ireland for bestowal of jewels and wealth upon the clergy and the churches, an improver of territories and churches, was killed in his own house by treachery, by Toirdhealbhach, son of Diarmaid Ua Briain, and by the two sons of O'Conchobhar Ciarraighe'; MCB 1138.1: 'king of the two provinces of Munster, and defender of all Leath Mogha, the most pious and valorous of men ... after building the church of Cormac at Cashel and twelve churches at Lismore, treacherously killed.' Father of Diarmaid of Cill Baghain. Wife not recorded in the annals. 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.]