| Namn | Licens | Födelseår | Far | Mor | Morfar |
|---|---|---|---|---|---|
| One In A Million | 217488 | 1997 | Lasandos | Marinens Lady Million | |
| One in Three | 201119 | 1984 | |||
| One More P | 215573 | 1996 | Power Boy RP 112 | Kitty Kanon RP 1093 | Urbino 430 |
| One More Penny | 955480 | 1990 | Tammer Fors xx | One Penny | Montal |
| One More Time KLT | 257040 | 2006 | Quite Easy | Justly KLT | Robin Z |
| One Night Stand | 243384 | 2002 | Lipton | Amazing Eyes xx | Irish Eyes xx |
| One o clock Jump | 999871 | 1995 | Eighty Eight Keys xx | Twilight Music xx | Music Streak xx |
| One Point | 225133 | 1994 | |||
| One Son | 12029 | 1985 | |||
| One Way | 214099 | 1995 | Epson | Good Girl | Good Future |
| One Way Ticket | 997656 | 1993 | |||
| One Zero | 216679 | 1990 | Ata Star L | Ciderella Hawk | Gouge |
| Onedin | 14733 | 1971 | Gödöllö | Gitte | |
| Onedin | 1978 | Oden | Unesco | ||
| Onega | 9310 | 1979 | Oden | Jona | Jovial |
| ONella | 15477 | 1983 | Othello | Petronella | Astronomer |
| Onesco | 20252 | 1985 | Orust | Sirocco | Zansibar |
| Onesian Girl | 1771 | 1977 | |||
| Onestep | 5972 | 1984 | Fellow | Courbette | Fritham Gay Clou |
| Onette | 3105 | 1979 | Hertigen | Goldie | Gaspari |
| Oniki W | 230915 | 1996 | Burggraf | Kobea | Ulft |
| Onina | 48446 | 1981 | Dragon | Onette | Prince Fair |
| Onina | 255717 | 2001 | Master (SWB) | Ockra | Martini |
| Onkel | 1936 | Avepal | Gulli | Goldonkel | |
| Only a Monarch | |||||
| Only Diamond SN | 245742 | 2004 | Orlando | Moonbeg | Imperius xx |
| Only Margreth | 200580 | 1993 | |||
| Only Me | 17702 | 1984 | Krevad | TelAviv | Kosack |
| Only One | 214406 | 1996 | Indoctro | Jolanda | Enrico |
| Only Sixteen | 227738 | 1999 | Wolkentanz | Glockenfee | Glockenklang |