| Registered Name | Owner / Club | Status |
|---|---|---|
| Ubert (KWPN) | James Breslin Meath | Approved |
| UC Tamworth | Miriam Davies Tinahely | Approved |
| Udo | Natasha Brotherton Kennedy Golden Grove | Approved |
| Uggool Fionn | Gill Phipps Calliaghstown | Approved |
| Uisce Babha | Rebecca Bowes Boru's | Approved |
| Uisce Beatha | Aisleen Keenan Ard Lu | Approved |
| Uisneagh Camus | Tony Ennis Anvil | Approved |
| Uline W | Lyndsey Walters Clonough | Approved |
| Ulverton Star | Jennifer Johnson Calliaghstown | Approved |
| Una Dolce Vita | Chiara Ruini Highland Lodge | Approved |
| Unbreakable Bond (IRE) | Elizabeth Gibney Carrickmines | Approved |
| Unbridled Power (IRE) | Libby Mooney Letterkenny | Approved |
| Undaris | Edmond Kearney Barrow Valley | Approved |
| Undeniably Bouncer | Suzanne Arthur Burren | Approved |
| Under The Spotlight | KATELYN BEATTIE Kilrainy | Approved |