Ælfthryth

Ælfthryth was Queen of the English from her marriage to King Edgar in 964 or 965 until Edgar's death in 975. Ælfthryth was the first wife of an English king known to have been crowned and anointed as queen. She had two sons with Edgar, the ætheling Edmund and King Æthelred the Unready. Ælfthryth was a powerful political figure and possibly orchestrated the murder of her stepson, King Edward the Martyr, in order to place her son Æthelred on the throne. She appeared as a stereotypical bad queen and evil stepmother in many medieval histories.