Paris - Île-de-France
- Costa Lunga
- Costa Monteiro
- Costabile
- Costadau
- Costalat
- Costaouec
- Costaramoune
- Coste de Bagneaux
- Costeau
- Costel
- Costemalle
- Costeplane
- Costerg
- Costerisant
- Costescu
- Costevec
- Costey
- Costinot
- Costo
- Costuas
- Cotasson
- Cotelli
- Cotenceau
- Cotereau
- Cotet
- Cothereau
- Cotibi
- Cotiche
- Cotier
- Cotigny
- Cots
- Cottais
- Cottalorda
- Cottart
- Cottat
- Cotteaux
- Cotter
- Cotterlaz Rennaz
- Cottignies
- Cottille
- Cotting
- Cotton de Bennetot
- Cottray
- Cotutiu
- Cotxet
- Coté
- Cou
- Couanet
- Couapel
- Couarch
- Couard
- Couarraze
- Coubat
- Coube
- Coubeche
- Coubel
- Coubra
- Coucharriere
- Coucoureux
- Coudair
- Coudari
- Coude
- Couderc-hubert
- Coudeville
- Coudevylle
- Coudeyras
- Coudeyre
- Coudiere
- Coudougnan
- Coudrai
- Coudreuse
- Coudrieu
- Coudroy
- Coudun
- Couec
- Couedelo
- Couerbe
- Coueron
- Couffignal
- Couffin
- Coughlin
- Cougnaud
- Cougnon
- Cougoureux
- Couhadon
- Couhaut
- Couic
- Couillabin
- Couillault
- Couillec
- Couix
- Coulau
- Couleaud
- Coulhon
- Coulibaly Camara
- Coulie
- Coulloudon
- Coulloux
- Coulm
- Coulmance