Aelfthryth

  Noted events in her life were:

• source. Mary-Ann Cook who writes:
Aelfthryth (c. 945-1000, also Alfrida, Elfrida or Elfthryth) was the second or third wife of King Edgar of England. Ælfthryth was the first king`s wife known to have been crowned and anointed as Queen of the Kingdom of England. Mother of King Ethelred the Unready, she was a powerful political figure. She was linked to the murder of her stepson King Edward the Martyr and appeared as a stereotypical bad Queen and evil stepmother in many medieval histories.

Aelfthryth married someone Edgar the Peaceable, son of Edmund the Magnificent and St Elgiva. (Edgar the Peaceable was born circa 942.)