Æthelflæd ĕ´thəlflĕd, ă´thĕlflăd [key] or Ethelfleda –flē´də [key], d. 918, daughter of King Alfred the Great of Wessex and wife of Æthelred, ealdorman [alderman or earl] of Mercia. After her husband's death in 911, she ruled the semi-independent Mercia alone. Campaigning with her brother, Edward the Elder , she helped to recover the Danish-held lands S of the Humber River. After her death Mercia became part of the kingdom of Wessex.
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