thelred, d. 871, king of Wessex (865-871),
son of Æthelwulf and brother of Alfred. He succeeded his brother
Æthelbert as king of Wessex and as overlord of Kent and possibly
of East Anglia. Æthelred spent much of his short reign gathering
forces to oppose the Danes, who had occupied York (866) and
ravaged much of England. Alfred was his important second in
command in a series of battles (870-71). Although Æthelred had
young children, Alfred suceeded him in April, 871, as better
fitted to defend the kingdom. [The Illustrated Columbia
Encyclopedia, 3rd ed., 1969]
Ethelred I (d. 871), king of the W. Saxons and Kentishmen. Along with Ælfred he saved Mercia from the Danes. [World Wide Illustrated Encyclopedia, 1935]
Reigned from 866 to his his death in 871, shortly after his victory over the Danes at Ashdown. {Chamber's Biographical Dictionary} [GADD.GED]
King of Wessex 866-871. [ROWLEYHR.GED]
Additional information: Britannia.com