Derived from the Old English elements æðel “noble” and stan “stone”. This was the name of a 10th-century English king, the first to rule all of England. The name was rarely used after the Norman Conquest, though it enjoyed a modest revival (as Athelstan) in the 19th century.
Derived from the Old English elements æðel “noble” and ræd “counsel”. This was the name of two Saxon kings of England including Æðelræd II “the Unready” whose realm was overrun by the Danes in the early 11th century. The name was rarely used after the Norman Conquest.