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
England–Wales border Silures, traditionally the area between the rivers Usk, Wye and the Severn estuary. It was centred at different times on "Venta" (Caerwent), from which it derived its name, and "Isca Augusta" (Caerleon). Gwent generally allied with, and at various times was joined with, the smaller Welsh kingdom of Ergyng, centred in present-day southern Herefordshire west of the Wye (and deriving its name from the Roman town of "Ariconium"); and the larger kingdom of Glywysing in modern Glamorgan. The name Glywysing may indicate that it was founded by a British native of "Glevum" (Gloucester). The Battle of Mons Badonicus, circa 500,