The king of Northumbria, who possibly became king while still a child, attempted to have another royal who was held responsible for the killing of Alkmund of Derby assassinated was AEthelred I.
Eardwulf of Northumbria
Eardwulf of Northumbria
Æthelred I of Northumbria
Æthelred I of Northumbria
Ælfwald II of Northumbria