Ecgfrith was king of Mercia from 29 July to December 796. He was the son of Offa, one of the most powerful kings of Mercia, and Cynethryth, his wife. In 787, Ecgfrith was consecrated king, the first known consecration of an English king, probably arranged by Offa in imitation of the consecration of Charlemagne's sons by the pope in 781. Around 789, Offa seems to have intended that Ecgfrith marry the Frankish king Charlemagne's daughter Bertha, but Charlemagne was outraged by the request and the proposal never went forward.
|King of Mercia|
|Reign||29 July 796 – December 796|
Ecgfrith was succeeded by a distant relative, Coenwulf, presumably because Offa had arranged the murder of nearer relatives in order to eliminate dynastic rivals. According to a contemporary letter from Alcuin of York, an English deacon and scholar who spent over a decade at Charlemagne's court as one of his chief advisors:
- That most noble young man has not died for his sins, but the vengeance for the blood shed by the father has reached the son. For you know how much blood his father shed to secure the kingdom upon his son.
Alcuin added: "This was not a strengthening of the kingdom, but its ruin."
- Ann Williams (1991). "Ecgfrith king of Mercia". In Ann Williams; Alfred P. Smyth; D. P. Kirby (eds.). A Biographical Dictionary of Dark Age Britain. Seaby. ISBN 1 85264 047-2.
- Kelly, S. E. (2007). "Offa (d. 796), king of the Mercians". Oxford Dictionary of National Biography. Oxford University Press. doi:10.1093/ref:odnb/52312. Retrieved 22 July 2012. (subscription or UK public library membership required)
- Stenton, Anglo-Saxon England, p. 220.
- Swanton, Anglo-Saxon Chronicle, p. 50.
- Lapidge, "Alcuin of York", in Lapidge et al., "Encyclopaedia of Anglo-Saxon England", p. 24.
- Letter of Alcuin to Mercian ealdorman Osbert, tr. in Whitelock, English Historical Documents, p. 787