Dál Riata
It is unlikely that Dál Riata was ruled directly by Pictish kings, but it is argued that Domnall, son of Caustantín mac Fergusa, was king of Dál Riata from 811 to 835. He was apparently followed by the last named king of Dál Riata Áed mac Boanta, who was killed in the great Pictish defeat of 839 at the hands of the Vikings.