The Annals of Ulster says that, in 878, "Áed mac Cináeda, king of the Picts, was killed by his associates.

"[1] Tradition, reported by George Chalmers in his Caledonia (1807), and by the New Statistical Account (1834–1845), has it that the early-historic mound of the Cunninghillock by Inverurie is the burial place of Áed.

A longer account is interpolated in Andrew of Wyntoun's Orygynale Cronykil of Scotland.

This says that Áed reigned for one year and was killed by his successor Giric in Strathallan and other king lists have the same report.

I shall tell you – it will be a tale of truth – he dies without bell, with communion, at evening, in a fatal pass.