Æthelwulf of Wessex
Æthelstan (; died c. 852) was the King of Kent from 839 to 851. He served under the authority and overlordship of his father, King Æthelwulf of Wessex, who appointed him. The late D, E and F versions of the "Anglo-Saxon Chronicle" describe Æthelstan as Æthelwulf's brother, but the A, B and C versions, and Æthelweard's "Chronicon", state that he was Æthelwulf's son. Some historians have argued that it is more probable that he was a brother, including Eric John in 1966 and Ann Williams in 1978. However, in 1991 Ann Williams described him as Æthelwulf's son, and this is now generally accepted by historians, including Frank Stenton, Barbara Yorke, and D. P. Kirby.