Be-Fail nic Einri (born 3 January 1083) was the fourth child and second daughter of Einri of Eire and Orlaith of Eire, the younger sister of Eochaid of Ulaidh, Focarta of Airgialla and Cobflaith nic Einri and the older sister of Caitilin nic Einri. She belonged to the Clan O'Connor of Tyrconnell.