| Registered Name | Owner / Club | Status |
|---|---|---|
| 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 |
| Zantino | Niamh Brady Cheval | Approved |
| Zaquito (SWB) | Val Joy Winterdown | Approved |
| Zara | Sean Kavanagh Kilmacredock | Approved |
| Zara Di Galloway | Alan Trautt Springmount | Approved |
| Zara Go Lightly | Fiona Horrigan Ballinasloe | Approved |
| Zara-O | FINTAN O' FLYNN Corrib | Approved |
| Zaras Zodiacal Light | Ellie O'Neill Thomastown and District | Approved |
| Zaristo | Sheila Fuller Cill Dara | Approved |