Kalends of January fourth feria, fourth of the moon. AD 631.
The battle of Cadwallon, king of the Britons, and Ainfrith.
The burning of Bennchor Mór in Britain, and the killing of Rónán son of Baetán.
The battle of Áth Abla, in which Dícuill son of Fergus Tuile fell by the Munster host.
The island church of Medgote was founded.
Mór Muman, daughter of Aed Bennán, died.