Withdrawal of all Roman forces and many societal leaders in about the year 410 may have allowed leading families of the Dobunni tribe to regain power within the now Roman-influenced, interconnected and intermixed Celtic Brythonic local people. This intermix is reflected by the fact a large minority of basic words and available synonyms in Welsh have a Latin base. In the "Anglo-Saxon Chronicle" Gloucester is shown as part of Wessex from the Battle of Deorham in 577. At some point afterwards, along with the rest of its shire excluding the Forest of Dean, Gloucester was part of the minor kingdom of the Hwicce. In 628, as a result of the Battle of Cirencester, that kingdom became a client or sub-kingdom of Mercia. From about 780, the Hwicce was no longer feigning any pretense as a kingdom and became part of Mercia. Mercia, allied by matrimony and sharing a desire to counter the Danish onslaught as had conquered swathes of the wider island at large, submitted to Alfred the Great's Kingdom of Wessex in about 877–883. A 20th century writer intuitively adds that Roman stem Gleu- Glev- was, doubtless, pronounced without any final consonant. "Claudia Castra" is mentioned in the 18th century as a possible Latin name related to the city.