1Cabariotobscure 
2CellesLatin, cella (cell) 
3CercouxLatin sarcofagus, coffin in the sense tomb 
4ChadenacLatin name, Capito +onis +acumSite of a military memorial of Claudian date.
5ChaillevetteGaulish *kal (stone) + avumFrom stone, stony
6ChambonGaulish *cambo (curved) 
7ChamouillacGaulish name *Camulius with -acumCamulius his place
8ChampagnacGaulish name *Campanius with -acumCampanius his place
9Champagne  
10ChampagnollesLatin, campagnia (fields) 
11ChampdolentCampus dolens (dolorous fields)Difficult to cultivate
12ChaniersLatin, canna (reed) + ariumReedy place
13Chantemerle-sur-la-Soie  
14Chapelle-des-Pots  
15CharronGaulish name Carrus + onem 
16ChartuzacGallo-Roman name *Cartusius + -acumCartusius his place
17Chateau-d'Oleron  
18Chatelaillon-PlageCastrum Julii in the middle ages, the Roman port of Aunis.Châtellaillon the old capital of the Aunis, once the pagus Aliensis. The old town of Châtellaillon on the cape, was destroyed by a tidal flood in 1430. In 1660, the seven remaining towers of Châtellaillon collapsed with the cliff.
19Chatenet  
20ChaunacGaulish name, Caunus + -acum 
21Chay  
22Chenac-Saint-Seurin-d'UzetLatin name Canus + -acum 
23ChepniersPossibly Latin canna (reed)The village is on a stream
24CheracGaulish name Carius with -acum 
25Cherbonnieres  
26ChermignacGallo-Roman name Carminius with -acum 
27ChervettesLatin, cannabus old French 'charva'Hemp
28ChevanceauxOld French 'chevance' a property. 
29ChivesCavius,Gallo-Roman personal name
30Cierzac  
31Cire-d'AunisVerger du Sud (le)Salt block manufactory in the marshes. The site is on a 70m hill composed of the waste from the salt blocks.
32ClamGaulish name *Clamus 
33ClavetteLatin, clavis (key)Little key
34CleracLatin name Clarus with -acum 
35ClionObscure 
36ClisseSaintongais word for hurdle, basketwork, 
37ClotteProvincial French, pit, ditch 
38CoivertProvincial French, watercourse + Gaulish, vernAlder stream
39ColombiersLatin, columbarium, dovecot 
40ConsacGaulish Contius + -acum, CunacoOr (less probable) the "condate" (confluence) in the table of Theodosius
41ContreLatin contre, land set aside 
42CorignacLatin *Corinius with -acum 
43Corme-EcluseOld French 'corme' sorb, fruit of the Service tree. 
44Corme-RoyalOld French 'corme' sorb, fruit of the Service tree.Gallo-Roman ville or vicus
45Couarde-sur-merFrom the name Couard 
46CoulongesColonica,Indicates a village of Roman settlers (colons)
47CourantDialectical 'watercourse' 
48CourcellesCurtius (fortified farm or enclosure) + cella (small round temple or room in a sanctuary),An agricultural estate attached to an abbey.
49CourceracLatin name, *Corciri with -acum 
50CourconLatin name Curtius + onem 
51CourcouryLatin name *Corcuri with -acum 
52CourpignacLatin name *Corpinius with -acum 
53CouxLatin 'cotis' stony places 
54CozesLatin 'cotis' stony places 
55Cramchaban  
56CravansCarvStones
57CrazannesLatin name Gratius + ana 
58CresseCrixacum, from the Gaulish personal name Crixios with -acumCrixios his place
59Croix-ChapeauObscure 
60Croix-Comtesse