| Anne Marie Cowles |
United States |
| Jenni & Corina Cox |
KS United States |
| Joyce Cox |
United States |
| Crabbet Arabian Stud |
Great Britain |
| William J. Craig |
WA United States |
| Michelle Craven |
NY United States |
| Cory & Karen Crawford |
WA United States |
| Anne Crew |
PA United States |
| Yvette M. Croteau |
WA United States |
| Meggan Crowley |
WA United States |
| Ursula Culer |
WA United States |
| Marie V. Curley |
CA United States |
| Jeanne King and/or Lura Curtiss |
WA United States |
| Lura Curtiss |
WA United States |
| Lura Curtiss |
WA United States |
| Mlle Cushing |
France |
| Topolcianky, Czechoslovakia |
Czechoslovakia |
| Janice Daines |
WA United States |
| David Damewood |
United States |
| Barbara Daniels |
OR United States |
| Homer Davenport |
United States |
| Daventry Farms |
United States |
| Gwyn R. Davis |
CO United States |
| Kathryn Daw |
CA United States |
| William E. Dean |
WA United States |