His death is reported in the usual brief style by the annalists, except for the continuator of Bede in Northumbria, possibly relying upon a Dál Riata source, who wrote: Óengus, king of the Picts, died.
A súa morte está rexistrada no estilo breve típico dos analistas, agás polo continuador de Bede en Northumbria, posiblemente confiando nunha fonte de Dál Riata, quen escribiu: Óengus, rei dos pictos, morreu.