| Lastname | City | State | Country |
|---|---|---|---|
| Olandres, Juran Martin | Philippines | ||
| Oldbull, Walker | Dulce, NM | United States | |
| Olivares, Omar | Peru | ||
| Oliver, Ikea | Ohio | United States | |
| Oliveras, Ivan | United States | ||
| Oliveria , Jakson | carpina | Brazil | |
| Orban, Ellen | Mountain City, TN | United States | |
| ORG. UNDERGROUND KENNELS, BLUE SKULL KINGDOM | Tuscaloosa | Alabama | United States |
| Orr, Alastair | Marietta, GA | United States | |
| Ortiz, Joel | Puerto Rico | ||
| Ortiz, Vlinda | Ovid, MI | United States | |
| ortiz, Andriu | El Tigre | Venezuela, Bolivarian Republic of | |
| ORTIZ, GILBERT | CUCUTA | Colombia | |
| Ortiz G, Jhon A | Zulia | Venezuela, Bolivarian Republic of | |
| Osman, Sam | United States | ||
| Osorio Cacha, Carlos Armando | Peru | ||
| Ostos Salvatierra, Luis | Peru | ||
| Owens, Kim Marie | United States | ||
| Pacana, Ramil | Iligan | Philippines | |
| Pacheco Garcia, Bryan | Peru | ||