Alt Clut
The ruler of Alt Clut during this time was either King Dumnagual map Riderch (Dumnagaul IV) or King Arthgal map Dumnagual, the exact year of the succession is unknown.
Dál Riata
The ruler of Dál Riata during this time was either King Áed mac Boanta or King Áed mac Boanta, the exact year of the succession is unknown.
Kent
The ruler of Kent was King Æthelwulf (the son of King Ecgberht III of Wessex), who had ruled since 825 and would continue to do so until 858.
East Anglia
The ruler of East Anglia was King Æthelstan, who had ruled since 827 and would continue to do so until 845.
Gwynedd
The ruler of Gwynedd was King Mermin ap Gwriad (Merfyn the Freckled), who had ruled since 825 and would continue to do so until 844.
Mercia
The ruler of Mercia was King Wiglaf, who had ruled since 827 and would continue to do so until 839.
Northumbria
The ruler of Northumbria was King Eanræd, who had ruled since 810 and would continue to do so until 841.
Fortriu
The ruler of Fortriu was King Eógan, who had ruled since 837 and would continue to do so until 839.
Wessex
The ruler of Wessex was King Ecgberht, who had ruled since 802 and would continue to do so until 839.