| Namn | Licens | Födelseår | Far | Mor | Morfar |
|---|---|---|---|---|---|
| O'h Boy | 11159 | 1975 | Cavallo Bolero | Horshaga Henriette | Downland Gale |
| O´Bama | 259976 | 2005 | El Bundy | Freya | Friedensfuerst |
| O´boy | 250156 | 1998 | |||
| O´boy | 985688 | 1987 | |||
| O´boy | 247952 | 2001 | |||
| O´boy P. | 223566 | 1999 | P. Garonne Marco | KaroLina | Kaliber |
| O´Day | 259693 | 1996 | D-Day | Keris | Darwin |
| O´dobby | 251381 | 2003 | Dardel | Vanessa | Rubignon |
| O´Key | 234720 | 1999 | Eighty Eight Keys xx | Matilda | O´den |
| O´Lady | 220166 | 2000 | |||
| O´Mallie | 230411 | 1999 | |||
| O´Man | 248939 | 2005 | Cathageno | Billan (23) (SWB) | Billion xx |
| O´melet | 256663 | 2005 | Ohorn | Flamette | Flamingo |
| O´Neill | 967911 | 1991 | Corá-san | Othella | Othello |
| O´Neill II | 247758 | 1996 | Coupon | Aspa | Latus |
| O´what Princess | 246334 | 2002 | |||
| O´xena | 230372 | 1999 | Artaxerxes | O´Bajana | Bajano ox |
| Oak Leaf | 2408 | 1976 | |||
| Oak Tree xx | 246287 | 2004 | Duty Time xx (GB) | Samba xx | Theatrician xx |
| Oakdale | 17468 | 1983 | Roman Warrior | Dear Jane | Dragonara Pallas |
| Oakhill Chessie | 214510 | 1996 | Chess | Urbinja (5) | Urbino |
| Oakhill Duchess | 232140 | 1999 | Chess | Urbinja | Urbino |
| Oakhill Giltedge | 226557 | 1997 | Goldlöwe | Urbinja | Urbino |
| Oakhill Shilton | 971710 | 1990 | Swift | Palea | Willowcratic xx |
| Oakhill Squirrel | 22235 | 1988 | Robin Z | Palea | Willowcratic |
| Oakhill Tiger Lily | 212041 | 1993 | Oakhill Shilton | Tiger Rose | Tiger Boy |
| Oakie Dokie | 224205 | 1996 | Rastell | Ofelia | Rex |
| Oaklands Dale | 5925 | 1981 | |||
| Oakley Starling | 8011 | 1967 | Burton Starlight | Oakley Jenny Wren | Brookside David |
| Oakman | 967131 | 1985 | Shafeek | Sikita | Figaro |