| Registered Name | Owner / Club | Status |
|---|---|---|
| Une Etoile Du Desert | Alex Mc Dermott Ross House | Approved |
| Une Petite Pomme Francaise | Claire Carty Ballycanew | Approved |
| Union Cruising | April Rees King Burren | Approved |
| Union Out of Touch | Eleanor Curran Tonabrockey | Approved |
| United Sir | Tony Murphy Winterdown | Approved |
| Until Proven Guilty | Anne O'Dowd Ashbrook | Approved |
| Untouchable Lady | John Kehoe Ard Lu | Approved |
| Unwavering (IRE) | Nessa Van Rooyen Calliaghstown | Approved |
| Up A Gear (USA) | Hazel McCarthy Thomastown and District | Approved |
| Upardalinho | Sarah Furney North Cork | Approved |
| Upper Church | Lorraine Kelly Castledermot | Approved |
| Uraan L | Terry Farrell Calliaghstown | Approved |
| Urania P.Van D'Oerte (KWPN) | Niamh Marsh Lismore | Approved |
| Urbi Et Orbi-S | Robert Murdy Ross House | Approved |
| Urlanmore Classie Lady | Kean O'Hara Benbulben | Approved |