c. 877 – 7 June 929
House: House of Wessex
Titles: Countess consort of Flanders
Ælfthryth of Wessex, also known as Elftrudis, Elftrude, or Elfrida, was an English princess and the countess consort of Flanders alongside her husband, Baldwin II. Born around 877, she was the youngest daughter of Alfred the Great, the Saxon King of England, and his wife Ealhswith. Her siblings included King Edward the Elder and Æthelflæd.
Her marriage to Baldwin II, Count of Flanders, occurred between 893 and 899, and she remained his consort until his death in 918. Together, they had several children, including Arnulf I of Flanders, Adalulf, Count of Boulogne, Ealswid, and Ermentrud.
Death: Ælfthryth died on 7 June 929. The place of burial is not specified.
Children: Arnulf I, Adalulf, Ealswid, Ermentrud
Marriages: Baldwin II, Count of Flanders
Parents: Alfred the Great and Ealhswith