Quick definitions from WordNet (Ethelred i)
▸ noun: king of Wessex and Kent and elder brother of Alfred; Alfred joined Ethelred's battle against the invading Danes and succeeded him on his death (died in 871)
▸ noun: king of Wessex and Kent and elder brother of Alfred; Alfred joined Ethelred's battle against the invading Danes and succeeded him on his death (died in 871)