| Registered Name | Owner / Club | Status |
|---|---|---|
| Simply Mitch | Michael McHugh Donegal Gaeltacht | Approved |
| Simply Red | Jennifer Kavanagh Greenvalley | Approved |
| Simply Winnie | Sarah Lester Border Counties | Approved |
| Sin A Bhuel | Carol Mulvihill Mosstown | Approved |
| Sin E Sham | Kevin Clogher Dalysgrove | Approved |
| Singing The Blues | Don Donnelly Cheval | Approved |
| Sinn E | Darren Daly Mo Chara | Approved |
| Sinoia Luna | Marion Kennedy Sarsfield | Approved |
| Siog Cionn Mhara | Patricia Young Calliaghstown | Approved |
| Siog Finsceal | Lorna O'Hare Dunbyrne | Approved |
| Siog Ghleoite | Lorraine O'Toole Calliaghstown | Approved |
| Siona Cruise | Angeline Carey Castledermot | Approved |
| Sionna Banshee | Kari Mohan Burren | Approved |
| Sionnach | John McDaid Donegal Gaeltacht | Approved |
| Sioux Indian | Ruth Mc Crossan Donegal Gaeltacht | Approved |