| Name | Country | Region | Address |
|---|---|---|---|
| Robert und Veronika Moser | Austria | ||
| Robert van Driel (Hidepl) | |||
| Roberta Osborne&Kelly Osborne | Canada | ||
| Robin Jezek | Czech Republic | ||
| Robinson Judith Luisa | |||
| Rock Ridge Thoroughbreds, LLC | USA | ||
| Rockride Stud, LLC, Erin Robinson & Malibu Moon Syndicate | USA | ||
| Rodevich Irina Anatolevna | Belarus | ||
| Rodichev Mikhail Konstantinovich | Russia | Moscow | |
| Rodimkin Sergey Ivanovich | Russia | Stavropol region |