| Registered Name | Owner / Club | Status |
|---|---|---|
| Ox View Paddy | Lizzy Naughton Round Tower | Approved |
| Oxmountain Heather | Maria Morgan Lakelands | Approved |
| Oxview Jasper | Lizzy Naughton Round Tower | Approved |
| Oxview Max | Mary Connolly Galway West | Approved |
| Oxview Mick | Lizzy Naughton Round Tower | Approved |
| Oyster Pearl | Sandra Phipps Calliaghstown | Approved |
| Ozzy Garrison | Elaine Callinan Carrickmines | Approved |
| P.H.I. Expresso | Rebecca Quinn Enniskerry | Approved |
| P.V. Alme Black | Kathryn Murphy Contarino Greenvalley | Approved |
| Pablo Boy | Hazel Sheehan Clonmel | Approved |
| Pacaian Spirit | Carol Quish Sarsfield | Approved |
| Pacinos Legacy | Abigail Quinn Westport | Approved |
| Paddington Himself | Cindy Wagner Kilotteran | Approved |
| Paddinton | Peter Flynn Highland Lodge | Approved |
| Paddy | Niamh O' Gorman Thomastown and District | Approved |