| Registered Name | Owner / Club | Status |
|---|---|---|
| Coronado Clover | Simone O'Shaughnessy Highland Lodge | Approved |
| Corragh Maxwell Lady | Francis Duffy Castle Leslie | Approved |
| Corrdubh Luca | Anita McNamara Castle Hill | Approved |
| Correal Champion | Megan Magennis Ard Lu | Approved |
| Corrib Star | Ian Quinlan Meath | Approved |
| Corrig Warrior (IRE) | Seana Devlin Lismore | Approved |
| Corrigeen Clover | Sean Keyes Benbulben | Approved |
| Corroy Candy | Elaine Hanahoe Nephin | Approved |
| Corsillagh Dark Countess | Roslyn Byrne Castle Hill | Approved |
| Corskeagh Express (IRE) | John McDaid Donegal Gaeltacht | Approved |
| Cortown Lassie | Dianne Kelly Ard Lu | Approved |
| Cortynans Danny Boy | Shannon Wright Border Counties | Approved |
| Cosima | Sasha Smith Clonshire | Approved |
| Cosimo | Jennifer Maher Lismore | Approved |
| Cosmic | Clare Harrington Dunbyrne | Approved |