ref: Wikipedia (http://www. wikipedia.org) (01 Apr 10) -
Ælfweard, House of Wessex (904 - 2 August 924) was the second son of Edward the Elder, the eldest born to his second wife Ælfflæd.
King of Wessex (perhaps), Reign (perhaps) 17 July 924 - 2 August 924.
Kingship and death
The Anglo-Saxon Chronicle simply states that Ælfweard died soon after his father's death on 17 July 924 and that they were buried together at Winchester Cathedral. Manuscript D of the Chronicle specifies that he outlived his father by only 16 days. No reign is explicitly attributed to him here. However, a list of West-Saxon kings in the 12th-century Textus Roffensis mentions him as his father's successor, with a reign of four weeks. He is also described as king in the New Minster Liber Vitae, a 11th-century source based in part on earlier material. On the other hand, William of Malmesbury, relying on a poem, related that Edward's eldest son (by his first wife Ecgwynn), Athelstan, succeeded directly under the terms of King Alfred's will (since lost). The poem had once been considered a near-contemporary authority, but Michael Lapidge has shown this to be based on a misunderstanding of William's reference to "a certain obviously ancient book".
This conflicting documentation has led to alternative interpretations, some modern historians concluding that he had succeeded his father in preference to his older half-brother Athelstan, while others maintain that Athelstan was the only heir to his father. Alternatively, a divided rule has been suggested, since the so-called Mercian register of the Chronicle reports that Athelstan became king of the Mercians, and William of Malmesbury, though denying a reign for Ælfweard, reports that Athelstan was educated at the Mercian court of his aunt Æthelflæd. By this theory, Ælfweard would have succeeded his father in Wessex and Athelstan in Mercia, the latter only acquiring Wessex following his brother's death shortly thereafter.
If king, Ælfweard was probably never crowned, dying 2 August 924 at Oxford. Athelstan himself was not crowned king of the Anglo-Saxons until 4 September 925 more than a year later.
It may be possible to confirm family relationships with Ælfweard by comparing test results with other carriers of his ancestors' Y-chromosome or mitochondrial DNA.
Y-chromosome DNA test-takers in his direct paternal line on WikiTree: