One records that he protested at the loss of a church at Cookham that was confiscated by King Cynewulf of Wessex sometime after 760.
In 786 Cynewulf was surprised and killed, with all his Thegns present, at Merantune (now called Marten, a hamlet in the county of Wiltshire), by Cyneheard the Atheling, brother of the deposed Sigeberht.
A place called Pryfetesflōd (Privett's River), located in the Weald, is mentioned in the 755 AD entry of the Anglo-Saxon Chronicle (the story of Cynewulf and Cyneheard), as the place where Sigeberht of Wessex, previously a ruler of Hampshire, was driven off to.
Prince Edward, Earl of Wessex | Sophie, Countess of Wessex | Egbert of Wessex | Cynewulf | House of Wessex | Ine of Wessex | Cynewulf of Wessex | Countess of Wessex | Westland Wessex | Godwin, Earl of Wessex | Sigeberht of Wessex | Ceawlin of Wessex | Æthelwulf of Wessex | Wessex Scene | Earl of Wessex | Cynegils of Wessex | Cwichelm of Wessex | Cerdic of Wessex | Æthelred of Wessex |
His brother Cyneheard was also driven out, but returned in 786 to kill Sigeberht's successor Cynewulf.