| Registered Name | Owner / Club | Status |
|---|---|---|
| Yukon Van Ark | Francis Flanagan Cheval | Approved |
| Yula Fluxiani | Julia Kennedy Killegar | Approved |
| Zac | Hannah Black Dunamase | Approved |
| Zac (TGCS) | Kay Treanor Castle Leslie | Approved |
| Zack | Michelle Byrne Calliaghstown | Approved |
| Zafeen Style | Hayley O'Shea Killcarrick | Approved |
| Zahari | Aoife Farrelly Mo Chara | Approved |
| Zahee (IRE) | Samantha Murphy South West | Approved |
| Zaitsev (IRE) | Joanne McCarthney Letterkenny | Approved |
| Zanadoo | Jane Richardson Boyneside | Approved |
| Zancibar | Kathleen Cowhig Highland Lodge | Approved |
| Zandan | April Rees King Burren | Approved |
| Zander Klein | Fiona Fitton Earl's Well | Approved |
| Zandor (KWPN) | Peter Dargan Kilrainy | Approved |
| Zanka | Susan O'Regan Earl's Well | Approved |