Saint Fer dá Chrích mac Suibni (also called Feardachrich, Feradach, Ferdachricus, Fer dá Crích, Ferdacrioch, ffear-Dachrich, Firdacrich; c. 710 – 18 May 768) was the Abbot of Armagh, Ireland from 758 to 18 May 768.
[3] On the death of Célé Petair, Abbot of Armagh, in 758, Fer dá Chrích was appointed as the 22nd coarb in succession to Saint Patrick.
Dúngal was defeated and slain along with his ally Donn Bó mac Con Brettan, king of Fir Rois.
Dúngal took the side of a priest named Airechtach versus the abbot Fer-dá-Chrích who was supported by Fiachnae.
The Annals of Tigernach for 759 state- "The battle of Emain Macha between the Ulaid and the Uí Néill, with Airechtach the priest of Armagh pushing in discord with the abbot of Fer da Crich, where Dungal grandson of Conaing and Donn Bó were killed.