Kalends of January
. AD 800.
The placing of the relics of Rónán son of Berach in a gold and silver casket.
Feidlimid grandson of Lugaid, abbot of Cluain Dolcáin, dies.
A battle between the Ulaid and the Uí Echach Cobha, in which Echu son of Ailill, king of Cuib, fell, and on the opposing side in battle Cairell son of Cathal fell; and his army was victorious.
Bresal son of Ségéne, abbot of Í, fell asleep in his 31st year as superior.
Ruamnus, abbot of Domnach Sechnaill, dies.
Be Fáil daughter of Cathal, Donnchad's queen, died.
Bresal son of Gormgal of Cenél Loegaire was treacherously killed by his kinsmen.
Cathrannach son of Cathal of Maenmag, and the anchorite Ninnid, rest.
A rainy summer.