Paris - Île-de-France
- Cissako
- Cistac
- Cisternas
- Citadelle
- Citroën
- Citterio
- City
- Ciucci
- Ciulla
- Ciupac
- Civiero
- Civil
- Cizeau
- Claassen
- Clabaux
- Clairice
- Clamy
- Clapot
- Claraz
- Clarens
- Clari
- Claris
- Clasen
- Clasquin
- Classeau
- Claud
- Claudeon
- Claudine
- Claudy
- Clausener
- Clausier
- Claustrat
- Claustres
- Clautiaux
- Clauvel
- Clauzier
- Claveria
- Clavery
- Clayer
- Clayeux
- Clayton
- Clec'h
- Clede
- Cleirec
- Clemencet
- Clemencin
- Clement Grandcourt
- Clementi
- Clements
- Clementz
- Clemessy
- Cleofe
- Clerempuy
- Cleren
- Clerice
- Clerin
- Clerte
- Cleton
- Clever
- Clevering
- Clier
- Clifford
- Cligny
- Clio
- Clipal
- Clipet
- Clocher
- Clochon
- Clodomir
- Cloppet
- Cloquet
- Cloteaux
- Cloup
- Cloute
- Clozel
- Cluzaud
- Clémence
- Cnocquaert
- Cnudde
- Coadic
- Coban
- Cobigo
- Cobral
- Cobti
- Coca
- Cocaign
- Cocard
- Cocault-duverger
- Cocca
- Cochener
- Cocheteux
- Cochis
- Cochois
- Cochon
- Cocito
- Cocozza
- Cocude
- Coda
- Codant
- Codjia