Æthelred I of Northumbria
…Alcuin's letters to Æthelred blaming this event on the sins of Æthelred and his nobility. On 29 September 792 Æthelred married Ælfflæd the daughter of Offa of Mercia at Catterick. While Æthelred was in Corbridge a group of conspiring nobles murdered him on 18 April 796. As a result, Osbald, an ealdorman and a friend…