Sigered of Essex was the last king of Essex from 798 to 825. The son of Sigeric of Essex, Sigered became king when his father abdicated the throne.
In 812 Sigered was reduced from king to duke by his Mercian overlords. In 825 he finally ceded the kingdom of Essex to Egbert of Wessex.
There are some records of Sigered's possible vassalage to Wessex, but they are not very clear or conclusive.
One source is a charter issued by Egbert in 825, which grants land to a monastery in Rochester . The charter mentions Sigered as âÂÂduke of the East SaxonsâÂÂ, and says that he consented to the grant along with other nobles. This shows that Sigered was still in power in 825, but under Egbert's authority.
Another source states in the year 825, Egbert of Wessex âÂÂconquered the kingdom of Kent and Sussex and Surrey and EssexâÂÂ. This shows that Sigered surrendered his kingdom (duchy) to Egbert without a fight, and it talks about him being a vassal.
However, another version of the Chronicle says that in the same year, Egbert âÂÂfought against Beornwulf and the Mercians at EllendunâÂÂ, and then âÂÂsent his son ÃÂthelwulf with an army into Kentâ . Though according to this chronicle it never mentions Essex, it is instead implied that Kent and Essex were both conquered, and may refer to them as East Saxons.