Ælfthryth of Wessex was born on an unknown date to Alfred the Great (849-899) and Ealhswith (c852-905) and died 7 June 929 of unspecified causes. She married Baldwin II of Flanders (c865-918) . Notable ancestors include Alfred the Great (849-899). Ancestors are from the United Kingdom, France.

Ælfthryth of Wessex was the youngest child of Alfred the Great (849-899), the Saxon King of England and his wife Ealhswith (c852-905). She had four or five siblings, including King Edward the Elder and Ethelfleda.


Ælfthryth was an ancestor of Matilda of Flanders, who married William the Conqueror, first monarch from the House of Normandy, which means that following the Norman conquest of England and the death of William I all the monarchs of England were also descendants of the House of Wessex.

Marriage and Family

Ælfthryth married Baldwin II (died 918), Count of Flanders.

They had the following issue:

  1. Arnulf I of Flanders (c. 890–964); married Adela of Vermandois
  2. Adalulf, Count of Boulogne (c. 890–933)
  3. Ealswid
  4. Ermentrud

It is not known what became of her daughters Ermentrud and Ealswid.


Offspring of Ælfthryth of Wessex and Baldwin II of Flanders (c865-918)
Name Birth Death Joined with
Arnulf I of Flanders (c890-965) 890 28 March 965 Adele de Vermandois (910-960)

Adalulf of Flanders (c890-933) 890 13 November 933
Ealswid of Flanders (c865-?)
Ermentrud of Flanders (c869-896)


Offspring of Alfred the Great and Ealhswith (c852-905)
Name Birth Death Joined with
Æthelflæd (c872-918) 872 Wessex 12 June 918 Tamford, Staffordshire, England Æthelred of Mercia (c855-911)

Edward the Elder (c870-924) 870 17 July 924 Ecgwynn (c875-)
Ælfflæd (c880-)
Eadgifu of Kent (c902-968)

Æthelgifu, Abbess of Shaftesbury (?-?)
Ælfthryth of Wessex (?-929) 7 June 929 Baldwin II of Flanders (c865-918)

Æthelwærd (c880-922) 880 Wessex 921 Wessex

Footnotes (including sources)

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