- Ethelred, Ethelred II, Ethelred the Unready - king of the English who succeeded to the throne after his half-brother Edward the Martyr was murdered; he struggled unsuccessfully against the invading Danes (969-1016)
--1 is a kind of king, male monarch
- Ethelred, Ethelred I - 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)
--2 is a kind of king, male monarch