| Registered Name | Owner / Club | Status |
|---|---|---|
| Clutz | Louise Grimes Winterdown | Approved |
| Clydagh Golden | Cola Fox Horetown | Approved |
| Clyde | Ryan McBride Donegal Gaeltacht | Approved |
| Clyde Durack | Joanne Hanrahan North Cork | Approved |
| Clyduff Ruby Tuesday | Pauline Powell Anvil | Approved |
| Cnoc an Noinin Boy | Hannah Mc Glinchey Letterkenny | Approved |
| Cnoc an Uisce (GB) | Lisa Richardson Waterford | Approved |
| Cnoc Mac Cloud | Brid Power Twinfort | Approved |
| Cnocban Blaze | Lynne Broderick Castle Hill | Approved |
| Cnocban Yasha | Deirdre Holmes Springmount | Approved |
| Cnocmor Black Magic | Barbara Harte West Cork | Approved |
| Cobalto XI | Caroline Marwood Knocknamana Country | Approved |
| Cobbler | Debbie Attwell Dennis Castle Hill | Approved |
| Cobtastic | Lorraine Kelly Castledermot | Approved |
| Coburg (IRE) | Tamarin Tomlin Carrickmines | Approved |