Rennes 35000 - Bretagne
- Bruchet
- Brunard
- Brune
- Buard
- Bucaille
- Budor
- Bui
- Bulourde
- Bunel
- Buot
- Burban
- Buret
- Burgaud
- Burin
- Burklin
- Burlot
- Burot
- Cado
- Caillault
- Caille
- Calmes
- Campion
- Canevet
- Carbonnel
- Caret
- Carreau
- Casanova
- Cassard
- Caudal
- Caudan
- Cellier
- Celton
- Cerisier
- Cetinkaya
- Cevaer
- Chaillot
- Chalopin
- Champain
- Chanu
- Chapdelaine
- Chapel
- Chapelain
- Chaplais
- Chapuis
- Charil
- Chartrain
- Chaudet
- Chaussavoine
- Chave
- Cheneau
- Chenut
- Cheron
- Chesnin
- Chesnot
- Chevreau
- Chiloux
- Chouan
- Christien
- Clair
- Claire
- Clerc
- Cloatre
- Clolus
- Coadic
- Cocaign
- Cochennec
- Cocherie
- Coconnier
- Cohignac
- Coiffic
- Colleaux
- Colliaux
- Collignon
- Collomb
- Commereuc
- Conquer
- Constant
- Coqk
- Coquerel
- Coquillet
- Cordelier
- Coriton
- Corlouer
- Cornut
- Cornée
- Cortillot
- Cosnier
- Cosset
- Coto
- Cotten
- Cottin
- Cotton
- Coudrais
- Couedic
- Coulange
- Courboulay
- Courcoul
- Courtet
- Courtille
- Courtillon