| Registered Name | Owner / Club | Status |
|---|---|---|
| Manx D | Avril Hobson Tinahely | Approved |
| Maperath Mollie | Barbara Mc Goldrick Meath | Approved |
| Maplevalley Cheryl | Natalie O'Keeffe Headfort | Approved |
| Maplevalley Masters Troy | Elizabeth Harris Castledermot | Approved |
| Maplevally Harveylicious | Courtney Gahan Coole Lane | Approved |
| Mar Station | Ted Murphy Clonshire | Approved |
| Marbridge Brigade | Bidina McCabe Calliaghstown | Approved |
| Marbridge Diamond Imp | Marguerite Curtis Brittas | Approved |
| Marcello (HANN) | Sarah McCutcheon South West | Approved |
| March Thunderball | Aine McLoughlin Mosstown | Approved |
| Marche Militaire (IRE) | Heather Kennedy Cheval | Approved |
| Marchese Marconi (IRE) | Casey Cushe Coole Lane | Approved |
| Marchesi Lady | Rose Shanahan Kilotteran | Approved |
| Marconi's Arthur | Abbey O'Driscoll Carne | Approved |
| Maree Barney | Gemma Smith Rathfarnham | Approved |