| Trakehner Name | Sex | Foaled | Sire | Dam | Color | |
|---|---|---|---|---|---|---|
| Ocelote xx | Stallion | Unknown | Unknown | |||
| O'Charlesy *M* | Mare | 1995 | Hailo *Pg*E* | Odessa | dark brown/black | |
| O. C. High Spirit xx | Mare | 1976 | Le Brigadier xx | Esperito xx | Unknown | |
| Ochina | Mare | 1989 | Tümmler | Ocho Ocho | dark bay/brown | |
| Ochoco Moon xx | Mare | 2004 | Ochoco xx | Moon Mood xx | bay | |
| Ochoco xx | Stallion | Unknown | Unknown | |||
| Ocho Ocho | Mare | Bolivar's Boy | Unknown | Unknown | ||
| Ochota 67 | Mare | Unknown | Unknown | |||
| O.C. Hot Love xx | Mare | 1976 | Le Brigadier xx | Princess Love xx | gray | |
| Ocoee xx | Stallion | Unknown | Unknown | |||
| Octavian vom Rappenhof | Gelding | 1998 | Carino *E* | Onia | brown/black | |
| Octavio | Gelding | 1996 | Onassis *E* | SA Mouida ox | bay | |
| Octavius | Gelding | 1990 | Wildfeuer | Odessa | bay | |
| Octo Boss xx | Stallion | Unknown | Unknown | |||
| Octo's Queen xx | Mare | 1973 | Octo Boss xx | Queenies Baby xx | bay | |
| Odalisque xx | Mare | Unknown | Unknown | |||
| Odds on Favorite xx | Mare | Unknown | Unknown | |||
| Odds On Tess | Mare | 1981 | Donaugeist | Faites Vos Jeux | gray | |
| Odds xx | Mare | 1982 | Well Mannered xx | Percent xx | Unknown | |
| Oder | Mare | Unknown | Unknown | |||
| Odessa | Mare | 1979 | Tannenberg *E* | Orelia | bay | |
| Odin SR | C | 2005 | Kostolany | Onia | black | |
| Oduagis xx | Stallion | Unknown | Unknown | |||
| Odyssey | Gelding | 1984 | Marcus | Charcoal Dolly | gray | |
| Oekonom | Stallion | Absalon | Mira | chestnut |