| Registered Name | Owner / Club | Status |
|---|---|---|
| Ynyslas (GB) | Anne Marie Hannon Mullingar | Approved |
| Yore Diamond | Susan Kennedy Castle Hill | Approved |
| You Little Daisy | Jason Coughlan Russellstown | Approved |
| You Too Bonnie | Kayleigh Murphy Golden Grove | Approved |
| You Two | Sarah McMickan Hollybrook | Approved |
| Youdbe (IRE) | Johanna Gilligan Tara Hill | Approved |
| Young Grandpa | Sandra Harkin Cill Dara | Approved |
| Young Limerick | Helen Harty Lismore | Approved |
| Young Pretender | Aphra Leavy Mullingar | Approved |
| Youngstars Cheetah | Katie Patterson Ard Lu | Approved |
| Youngstars Manhattan | Lydia Dawson Kilronan | Approved |
| Yukon Clover | Sandra Hannigan Cheval | Approved |
| Yukon Cristo | Sandra Hannigan Cheval | Approved |
| Yukon Diamond | Eddie Hannigan Cheval | Approved |
| Yukon Don | Francis Flanagan Cheval | Approved |