Toponymy of England the specific names for each may only have little relation to the Roman names (e.g. modern Chester was actually called Deva by the Romans). Modern Winchester was "Venta Belgarum", the "Win-" element deriving from "Venta" in a similar way to the names "Caerwent" and "Gwent" from "Venta Silurum" in south Wales. In Cornwall, most placenames are Cornish in origin: e.g. "Penzance" (holy headland). In eastern Cornwall, the names show a stronger English influence. Placenames of Cornish origin are also found in the South Hams, North Devon and West Somerset. Brythonic but non-Cornish placenames, sometimes showing Cornish or Welsh influence, are
Venta Silurum to the emerging Kingdom of Gwent (called initially "Kingdom of Guenta"), and the town itself became known as "Caer-went" or "the castra/fort of Venta/Gwent". Tradition holds that Caradog Freichfras of Gwent moved his court from Caerwent to Portskewett around the 6th century. The town lacked substantial defences until the mid 4th century when stone town walls were built. A small garrison may have been based in the town during this period. Large sections of the defensive walls are still in place, rising up to 5 metres in height in places. The walls have been described as "easily the most impressive