| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 481 | Oswine | Anglo-Saxon | Name of a king. | M | |
| 482 | Oswiu | Anglo-Saxon | Name of a king. | M | |
| 483 | Oswy | Anglo-Saxon | Name of a king. | M | |
| 484 | Otha | Anglo-Saxon | Little wealthy one. | F | |
| 485 | Othili | Anglo-Saxon | Little wealthy one. | F | |
| 486 | Ottilie | Anglo-Saxon | Little wealthy one. | F | |
| 487 | Oxa | Anglo-Saxon | Ox. | M | |
| 488 | Page | Anglo-Saxon | Page. | M | |
| 489 | Paige | Anglo-Saxon | Page. | M | |
| 490 | Peada | Anglo-Saxon | Name of a prince. | M | |
| 491 | Pearce | Anglo-Saxon | Rock. | M | |
| 492 | Penda | Anglo-Saxon | Name of a king. | M | |
| 493 | Pendragon | Anglo-Saxon | From the dragon's enclosed land. | M | |
| 494 | Penrith | Anglo-Saxon | From Penrith. | M | |
| 495 | Perry | Anglo-Saxon | Pear tree. | M | |
| 496 | Pierce | Anglo-Saxon | Rock. | M | |
| 497 | Piers | Anglo-Saxon | Rock. | M | |
| 498 | Pleoh | Anglo-Saxon | Danger. | M | |
| 499 | Prasutagus | Anglo-Saxon | Name of a king. | M | |
| 500 | Putnam | Anglo-Saxon | Dwells by the pond. | M | |