- Orris Keehr
- Osborne John Tancock
- Oscar Boesch (Primary Source)
- Oscar Fiteni
- Otto Hasibeder
- Otto Hemmerling
- Owen Rowe
- Owen Thomas Joe Fauvel
- Owen William Lucky Lockyer
- Pacifico Valeriote
- Pamela Hobbs Kanis
- Pamela Hobbs Kanis
- Pat Hearns (Primary Source)
- Pat Norman Honeyman
- Sheridan "Pat" Patterson (Primary Source)
