The ruler of Alt Clut was King Riderch map Eugein (Riderch II), who had ruled since 780 and would continue to do so until 796.
The ruler of Dál Riata at this time was likely to have been King Achaius mac Áeda Find.
The ruler of Dumnonia during this time was either King Oswallt ap Cawrdolli or King Hernam ap Oswallt, the exact year of the succession is unknown.
King Offa who had ruled since 757, and ruled jointly with his son, Ecgfrith , from 787.
The ruler of Northumbria was King Æthelræd I, who had ruled since 790 and would continue to do so until 796.
The ruler of Fortriu was King Caustantin, who had ruled since 789 and would continue to do so until 820.