| Registered Name | Owner / Club | Status |
|---|---|---|
| Jeffro | Laurie Cordonatto Killcarrick | Approved |
| Jejum | Grainne Murphy Unicorn | Approved |
| Jekyll and Hyde | Elaine McGowan Leitrim | Approved |
| Jemima | Jessica Lalor Dunamase | Approved |
| Jena | Roy Anderson Mullaghmore | Approved |
| Jenny Gee | Samantha Hayes Golden Grove | Approved |
| Jenny Kelly Ballyhyland | Etta Hayes Dunamase | Approved |
| Jeremiah (BWP) | Avril Clear Dunbyrne | Approved |
| Jerichos Magic | Ron Chawke Macetown | Approved |
| Jerpoint Dominio | Laura Forde Burren | Approved |
| Jerpoint Silver | Mary Wemyss Warrington | Approved |
| Jersey Boy | Evelyn Healion Kilrainy | Approved |
| Jessica J | Caroline Leahy Kerry | Approved |
| Jessie D | Hannah Doherty Inishowen | Approved |
| Jessie James II | Rachael Switzer Moyglare | Approved |