Ælfthryth of Crowland
（重定向自Alfreda）
Ælfthryth, also known as Alfreda or Etheldritha, is a saint, venerated in the Roman Catholic Church, as a virgin, and recluse. She was a daughter of King Offa of Mercia.
According to a late and not very trustworthy legend she was betrothed to Saint Æthelberht, but when he came to the court of Offa to claim her, he was treacherously murdered by the contrivance of Cynethryth, Offa's queen.