Æthelflæd

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Æthelflæd (ĕ´thəlflĕd, ă´thĕlflăd) or Ethelfleda (–flē´də), 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.