| Registered Name | Owner / Club | Status |
|---|---|---|
| Wilderwood Midnight Empress | Sharon Nye South West | Approved |
| Wildwood Pearl | Janice Clarke Ard Lu | Approved |
| Wilhelmina Q | Sarah Kelly Drake Rathangan | Approved |
| William | Jacqueline O'Brien Cheval | Approved |
| William's Hero | Ximena Hamer Barnacarroll | Approved |
| William's Nephew (IRE) | John Joe Grace Slieve Bloom | Approved |
| Williamstown Fella | Debbie Kelly Mo Chara | Approved |
| Williamstown Lad | Christine Hawkins Killossery | Approved |
| Willow Diamond | Gwen Draper Benbulben | Approved |
| Willow Elessar | Maeve Corkery Earl's Well | Approved |
| Willow The Wisp | Siobhan Hughes Springmount | Approved |
| Willowdule Bert | William Pretorius Newcastle Lyons | Approved |
| Willows Black Diamond | Niamh Daly Moyglare | Approved |
| Willows Cindrella | Hilary MacHugh Hollybrook | Approved |
| Willows Indian Beat | Mark Rapple Corrib | Approved |