- O'Brien, Craig Mark1
- O'Brien, Jason Thomas1
- O'Brien, Jennifer Marie1
- O'Donnell, Lindsay R.1
- O'Donnell, Lindsay Rose1
- O'Rourke, Jeffrey Eugene1
- OConnor, Sean1
- Obal, Joshua Keith1
- Ola, Emmanuel1
- Oliveira, Michael1
- Oprica, George Michael1
- Orlando, Ryan Neil1
- Osler, Alexander Peter1