Lannion 22300 - Bretagne
- Claude
- Claudot
- Cleonia
- Clerge
- Clerice
- Clervoy
- Clolus
- Clps
- Coadou
- Coail
- Coatanhay
- Cochereau
- Cochin
- Cochois
- Cochran
- Coeff
- Coeurderoy
- Cohonner
- Coiffard
- Cointo
- Cojean
- Cojocea
- Colas
- Coldefy
- Collard
- Collette
- Collier Millington
- Colloc
- Colzy
- Combot
- Comin
- Comité de Jumelage Lannion Viveiro
- Condette
- Condom
- Conel
- Conq
- Conseil
- Constant
- Conti
- Conté
- Copy
- Coquet
- Coquil
- Coquillé
- Cordesse
- Cordier
- Cordion
- Cordion-lecerf
- Corlaix
- Cormillot
- Corrales
- Corrien
- Corrio
- Corvaisier
- Cosentino
- Cosker
- Cosnard
- Cossic
- Cosson
- Costa
- Coste
- Costes
- Costevec
- Cotel
- Coton
- Cotte
- Cottereau
- Cottet
- Cottin
- Couderchon
- Couepel
- Couffrand
- Coulibaly-taquin
- Couloigner
- Coulon
- Coulouarn
- Coupier
- Coupé
- Courbe
- Courduries
- Courgeon
- Couronne
- Court
- Courtay
- Courtelle
- Courtes
- Cousin
- Coutelle
- Couty
- Couvreur
- Cox
- Coyat
- Cozigou
- Crabouillet
- Cras
- Cravec
- Creac H
- Crec'hdu
- Crech Du
- Crespel