Participant:
Ęthelwulf 1
(King of the West Saxons, 839-856; king of Kent, Sussex & Essex, 856-858)
(Other):
Charles 4
(the Bald, king of the Franks, 840-877; emperor, 875-877) : Charles 4 gave his paternal assent to his daughter's being given as queen to Ęthelwulf 1.