Synonyms for Ethelred (same or very similar meaning)
WordNet sense 1 (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)):
Ethelred II, Ethelred the UnreadyWordNet sense 2 (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)):
Ethelred IFrom the ODE community, based on WordNetadd/edit