Ælfthryth

http://fmg.ac/Projects/MedLands/ENGLAND,%20AngloSaxon%20nobility.ht...

is the location in the Projects/Medlands where the children of Earl Uhtred of Northumbria are given. This profile person is discussed under "Earl Uhtred & his third wife had [two children]:" first one being Elgifu/Ealdgyth who married Maldred, the brother of Duncan I of Scotland. The second child was the subject of this profile but not named in the text. It is suggested that she was the wife of ÆTHELGAR and that wife it is presumed had the name given for this profile. She would then also be the mother of Siward born circa 1036 to 1046 and of son Ealdred born before 1046. In 1067 the two sons are recorded as making peace with KIng Willliam I of England: "Siwardus et Aldredus filii Ædelgari pronepotes regis, Edricus...cognomento Guilda id est sylvaticus nepos Edrici pestiferi ducis cognomento Streone id est adquisitoris” made peace with William I King of England, dated to 1067." from Medlands above.

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Eldred is a possible son of Æthelred Unræd and his first wife Ælfgiva [%C3%86lfl%C3%A6d, Elgiva, Elfride]

Children:

4. EADRED (-[1012]). "Eadred regis filius/clito" subscribed charters of King Æthelred II dated between 993 and [1012/13][1813], a charter dated 1011 specifying "Eadred tercia proles regia"[1814].

Eadred was named after "Eadmund" in all lists in which the two appear, consistent with his being his father's fourth son. If this is correct, it is assumed that Eadred was the son of King Æthelred´s "wife" Ælflæd, although he is not specifically named by Florence of Worcester as one of her children. "Eadric clito" subscribed a charter of King Æthelred II dated 1005[1815]. As this charter is not one subscribed by "Eadred", it is reasonable to assume that this is a copyist's error rather than that King Æthelred had another son of this name. "Eadred clito" countersigned his father's 1006 charter making grants to St Alban's, signing fifth among the brothers[1816].

Eadgar or Edgar, son of Æthelred and Ælfflæd

no known children

http://fmg.ac/Projects/MedLands/ENGLAND,%20AngloSaxon%20&%20Dan...

5. EADGAR (-[1012/15]). "Eadgarus filius regis/clito" subscribed charters of King Æthelred II dated between 1001 and 1008[1832]. He is named after his brother Eadwig in the lists of subscribers, consistent with Eadgar being the sixth son. Eadgar countersigned his father's charter dated 1002 which grants land at Codicote, Hertfordshire to Ælthelm, signing sixth among his brothers[1833], and "Eadgar clito" his father's 1006 charter which made grants to St Alban's, signing seventh[1834].