Ælfgifu, daughter of Æthelred II "the unready," King of England and Ælfgifu, married, as his 2nd wife, Uchtred, Earl of Northumbria, son of Waltheof.1,2
- [S1954] Stewart Baldwin, The Henry Project: The Ancestors of King Henry II of England: An Experiment in Cooperative Medieval Genealogy on the Internet, http://sbaldw.home.mindspring.com/hproject/prov/aelfg002.htm, accessed 14 Aug 2016. Hereinafter cited as Baldwin, The Henry Project.
- [S89] Frederick Lewis Weis, Walter Lee Sheppard Jr. and David Faris, Ancestral Roots of Certain American Colonists Who Came to America before 1700: The Lineage of Alfred the Great, Charlemagne, Malcolm of Scotland, Robert the Strong, and Some of Their Descendants, 7th ed. (Baltimore, Maryland: Genealogical Publishing, 1992), 34-20, further cited as Weis, Sheppard, and Faris, Ancestral Roots, 7th ed.
- [S89] Weis, Sheppard, and Faris, Ancestral Roots, 7th ed., 34-21.