| Trakehner Name | Sex | Foaled | Sire | Dam | Color | |
|---|---|---|---|---|---|---|
| Obi-Wan vom Rappenhof | Stallion | 1999 | Carino *E* | Onia | brown/black | |
| Obraztsovy xx | Stallion | Unknown | Unknown | |||
| Obri de Fondelyn (AA) | Mare | Unknown | Unknown | |||
| Obsession | Stallion | 1988 | Marcus | Not Yet | bay | |
| Obsidian | Mare | 1979 | Virgil *E* | Crafty Actress xx | black | |
| Ocalina ox | Mare | Unknown | Unknown | |||
| Ocamonte xx | Stallion | Unknown | Unknown | |||
| Ocarina | Mare | 1998 | Martini *Pg*E* | Operetta | bay | |
| Occupation xx | Stallion | Unknown | Unknown | |||
| Occupy Miss xx | Mare | Unknown | Unknown | |||
| Occupy xx | Stallion | Unknown | Unknown | |||
| Ocean | Mare | Unknown | Unknown | |||
| Oceana | Mare | 2000 | Hadrian | Only Yesterday xx | liver chestnut | |
| Ocean Anna xx | Mare | Unknown | Unknown | |||
| Oceanette xx | Mare | 1961 | Oceanus II xx | American Lady xx | Unknown | |
| Ocean Flow | Mare | Unknown | Unknown | |||
| Ocean Front xx | Stallion | Unknown | Unknown | |||
| Ocean Monarch xx | Mare | Unknown | Unknown | |||
| Oceanna | Mare | 1978 | Bagatell | Opferfeuer | chestnut | |
| Ocean Quest xx | Stallion | Unknown | Unknown | |||
| Ocean Rose xx | Mare | Unknown | Unknown | |||
| Oceanus II xx | Stallion | Unknown | Unknown | |||
| Ocean Velvet | Mare | Unknown | Unknown | |||
| Ocean Ville xx | Mare | Unknown | Unknown | |||
| Ocean War xx | Mare | Unknown | Unknown |