Ca
Ce
Ch
Ci
Cl
Co
Cr-Cs
Cu
Cy
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Caa-Caf
- Cabaret
- Caberfeidh
- Cabinessence
- Caelmiri
- Caen
- Caer Gleaw
Cag-Cak
Cal
- Cala-Call
  - Caldon Jay
  - Calfrious
  - Caliburnum
  - Calico
  - Calico Jack
  - Callipygian
  - Calluna
- Calm-Calz
  - Calm Chaos
  - Calpe
  - Calvert
  - Calypso +2
Cam
Can
- Cana-Canm
- Cann-Canz
  - Canny
  - Canny Annie
  - Canny Fox
  - Cantabile
  - Canterbury
  - Canticle
  - Canute
Cap
Car
- Cara-Carl
  - Caracole
  - Cardinal
  - Carefree
  - Caretta
  - Cariad +3
  - Carianne
  - Carillon
- Carm-Carz
Cas-Caz
- Casa-Cash
  - Casa
  - Casa Blanca
  - Casa Dwr
  - Casablanca
  - Cascade +3
  - Cashflow
- Casi-Cass
- Cast-Casz
- Cat-Caz
  - Catalina +2
  - Catarina
  - Catawba
  - Catflap
  - Catherine
  - Catherine J
  - Catref
  - Catspaw
  - Cawky

Cha
- Chaa-Chaq
  - Chaffinch
  - Chalky's Dream
  - Champion
  - Chance
  - Chantecleer
  - Chanterelle
  - Chaos
- Char
- Chas
- Chat
- Chau-Chaz
  - Chavori
  - Chazmar
Che-Chh
- Chea-Cheq
- Cher
  - Cherie
  - Cherry Lea
  - Cherry Tree
  - Cherry +2
  - Cherry-Ho
  - Cherub
- Ches-Chez
  - Ches
  - Cheshire Cat
  - Cheshire Junk
  - Chester's Gal
  - Chesterton +2
  - Chestnut
  - Cheswold
  - Chetwynd
- Chh
  - Chhabri
Chi
- Chi-Cheemaun
- Chickadee
- Chileka
- Chill
- Chillin
- Chiltern Rose
- Chimera
- Chinablu
- Chipesch
- Chisbury
Cho
- Chocolate Frog
- Choice
- Cholet
- Chough
Chr
Chu-Chz

Coa-Cok
Col
- Coleen
- Colet
- Collie Wobbles
- Colonel Carless
- Colorado
- Colpitts
- Columbae
- Columbo
- Colwich Marina
Com
Con
- Cona-Conk
- Conl-Conz
Coo-Coq
Cor
- Cora-Corl
  - Cordelia
  - Corinna
  - Coriolis
  - Corixa
  - Corkscrew
- Corm-Corz
Cos-Cou
Cov-Coz
- Covenant Connection
- Cowslip

Cua-Cur
- Cuckoo Land
- Cullen
- Cupcake
- Curlew
Cus-Cuz
- Cushie
- Cushla
- Cushy
- Cut Above
- Cutter
- Cutty Wren
- Cuz I Can