Ecgberht

Ecgberht Aetheling (Old English Æþeling) was one of the eight sons of the early English king Æþelræd II (more commonly known as Ethelred the Unready). Little or nothing is known of his life.

http://en.wikipedia.org/wiki/Ecgberht_%C3%86theling

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

ECGBERHT (-1005). "Ecgbyrht/Ecbyrhtus filius regis/clito" subscribed charters of King Æthelred II dated between 993 and 1005, in all cases named directly after his brother Æthelstan, consistent with Ecgberht being the second son[1810]. If this is correct, it is assumed that Ecgberht was the son of King Æthelred´s "wife" Ælflæd, although he is not specifically named by Florence of Worcester as one of her children.