| Registered Name | Owner / Club | Status |
|---|---|---|
| Born This Way | Sharon McGowan Benbulben | Approved |
| Born to Bounce | Anthony Kenna Carne | Approved |
| Borneo Sensation | Eimear McGovern Waterford | Approved |
| Boro Breeze (IRE) | Carol Ann O' Neill Barrow Valley | Approved |
| Borris Apples | Mary Nyhan South West | Approved |
| Borris Elsie | Anthony Behan Coole Lane | Approved |
| Borris KH | Jane De Roquancourt Unicorn | Approved |
| Borris Lizzy | Ginny Hutton Rock of Cashel | Approved |
| Bosley | Kate Murray West Cork | Approved |
| Boss Hog | Iris Coleman Anvil | Approved |
| Boston Boy II | Sinead Boyd Slieve Bloom | Approved |
| Boswell Lilly | Una Delahunt Calliaghstown | Approved |
| Bothar Dubh Boy | Jessica Leahy Lismore | Approved |
| Botlogue Boy | Jane Ryan Springmount | Approved |
| Bouchaill Dathiuil | Sarah Sexton West Cork | Approved |