| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Orrell | - | English (Rare) | ||
| Osbert | AHZ-bərt | English (Rare) | ||
| Osbourne | AHZ-born | English (Rare) | ||
| Osmond | AHZ-mənd | English (Rare) | ||
| Oswin | AHZ-win | English (Rare) | ||
| Ottoline | - | English (Rare) | ||
| Pace | PAYS | English (Rare) | ||
| Pacey | PAY-see | English (Rare) | ||
| Paden | PAY-dən | English (Rare) | ||
| Paget | - | English (Rare) | ||
| Pamila | - | English (Rare) | ||
| Parris | PER-is, PAR-is | English (Rare) | ||
| Patton | PAT-ən | English (Rare) | ||
| Pauleen | paw-LEEN | English (Rare) | ||
| Paulene | paw-LEEN | English (Rare) |