| Registered Name | Owner / Club | Status |
|---|---|---|
| Tonafora Lass | Orla O'Kelly Highland Lodge | Approved |
| Tonagh Flash Flood | Fiona O' Connor Newpark | Approved |
| Tonix | Ita Walsh Tynagh | Approved |
| Tonlegee Two For Joy | Una Morris Killegar | Approved |
| Tonnsfield Coloured Boy | Peter Toole Meath | Approved |
| Tonto Lad | Maria Cahill Carrickmines | Approved |
| Tonys Glory | Lisa Mulhall Coole Lane | Approved |
| Too Blue | Frank O' Donnell Enniskerry | Approved |
| Too Cool To Cruise | Sharon McGowan Benbulben | Approved |
| Toome Carrick Jack | Michelle Brannigan Moyglare | Approved |
| Toome Cruising Jimmy | Michelle Brannigan Moyglare | Approved |
| Toome Ramiro Pippin | John Gavin Ashbrook | Approved |
| Toomevara Grey | Jennifer Lalor Dunamase | Approved |
| Toorboy Woody | Katie Gallagher Thornton | Approved |
| Tooreigh Beauty | Irene Casey Sarsfield | Approved |