Æthelflæd, Lady of the Mercians, (d. 12 June 918) was the eldest daughter of Alfred the Great, king of the Anglo-Saxon kingdom of Wessex, and his queen, Ealhswith. Æthelflæd was born at the height of the Viking invasions of England. Her father married her to Æthelred, Lord of the Mercians. After his death in 911 she ruled Mercia until her own death in 918. The Anglo-Saxon Chronicle referred to her as the Myrcna hlæfdige, "Lady of the Mercians".