The Roman Map of Britain Cantia Elm Farm, Podimore, Somerset
In medieval manuscripts ti or di with following vowel or diphthong are frequently replaced by z. PNRB describes this as "/tj/ when assibilated in Vulgar Latin as z".
Cantia is the source of the name Kent. In the northeastern quarter there is only one Roman site I know of that is both on a Roman road and near a river derived from Cantia. The Roman villa at Gatcombe (ST5269) is on Margary 545 (Flax Bourton (Gatcombe) - Abbots Leigh) and near the source of the River Kenn. The village of Kenn is Chen(t) 1086.
The village of Kenn ST4169 and its river are situated in a heavily canalized low-lying area. According to Ekwall the river originates 'E of Nailsea'. OS maps show it joined with the Land Yeo on the east of Nailsea. The Land Yeo originates near Gatcombe, approaches the Kenn again on the west side of Nailsea, then empties into the Severn estuary at Clevedon. Maps of the reconstructed coastline during the Roman era (10-15m elevation) show the Land Yeo, but omit the Kenn. According to Ekwall, Yeo is a dialectical form of OE êa 'river'. No early forms are recorded for the Land Yeo. I cannot say that the old name of the Land Yeo was *Cantio, but it seems quite possible.
A limited sampling of
known and possible settlements in the vicinity that show potential for Cantia.
KENN; NORTH SOMERSET; AVON ST 42 68 SITE, Roman EHNMR-654740
RUST BRIDGE,KENN, NORTH SOMERSET; AVON ST 41 68 SITE, Roman EHNMR-1049350
LAND AT CHERRY TREE FARM, KINGSTON SEYMOUR; NORTH SOMERSET; AVON ST 40 66 SITE, Roman EHNMR-1339005
YATTON, NORTH SOMERSET, AVON ST 42 67 SETTLEMENT, Roman EHNMR-634071
HAM FARM; YATTON; NORTH SOMERSET; AVON ST 42 67 CORN DRYING KILN, Roman EHNMR-634069
Between Ilchester and Shepton Mallet there is another place where Cantia might be found. Camel, Queen ST5924 & West ST5724 Cantmæl 995 is identified with a long ridge known as Camel Hill ST5825, Celtic canto- circle, rim' W. cant 'rim of a circle' (compare Quantock Hills). The ridge extends westward toward Podimore ST5426 OE 'frog moor', if comparable to Podmore Staffordshire. Podimore is 3/4 mi east of the Fosse Way on dry ground just above the 15m line, and just above the limit of inundation. Found there are the remains of a settlement that was occupied from the middle Iron Age to the 4th cent.
ELM FARM; PODIMORE (300 YARDS SW OF);
YEOVILTON; SOUTH SOMERSET ST5425 SETTLEMENT, Roman; TRACKWAY, Roman; FIELD
SYSTEM, Roman EHNMR-634837
PODIMORE; YEOVILTON; SOUTH SOMERSET ST5425 SETTLEMENT, Iron Age; SETTLEMENT, Roman EHNMR-634839
YEOVILTON; SOUTH SOMERSET; SOMERSET ST 5441 2467 Iron Age / Romano-British settlement
Historic Environment Record 54793 Iron age and Roman occupation, SE of Podimore
Somerset Historic Environment Record 54794 Iron age settlement, SW of Podimore
Somerset Historic Environment Record 55111.Cropmark field system, NW of Bridgehampton
This is by far the best solution.