Paris - Île-de-France
- Coslin
- Cosnard
- Cosqueric
- Cossa
- Cossin
- Costagliola
- Costanzo
- Costecalde
- Costerousse
- Costi
- Costiou
- Cotard
- Cotelle
- Coti
- Cotin
- Cottenot
- Cottinet
- Cottret
- Coubes
- Coudreau
- Coudurier
- Coudy
- Coulier
- Coulom
- Coulombel
- Couly
- Coumau
- Coupel
- Couppe
- Couppey
- Couque
- Couratier
- Courbiere
- Courbot
- Courchinoux
- Courel
- Couriol
- Cournet
- Cournil
- Coursaget
- Coursier
- Coursimault
- Coursol
- Courtay
- Courtecuisse
- Courtemanche
- Cousi
- Cousseran
- Coussieu
- Coussot
- Cousteix
- Couston
- Cousy
- Coute
- Coutureau
- Couve de Murville
- Couvrat
- Couzinier
- Couzon
- Cozian
- Crampon
- Credoz
- Cremel
- Cremniter
- Cremona
- Crespi
- Cressy
- Cretu
- Creuzot
- Creveau
- Crevel
- Croisier
- Crouan
- Crouzat
- Crowley
- Cruickshank
- Cruveiller
- Cruzel
- Créange
- Cuchet
- Cudennec
- Cueto
- Cuisset
- Culerrier
- Cumunel
- Cunat
- Cuoq
- Cupillard
- Curet
- Curier
- Curpen
- Curty
- Custodio
- Custos
- Cuypers
- Cuzon
- Cvoric
- Cyrot
- Czajkowski
- Czechowski