| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 501 | Odiane | German | Elfin spear. | F | |
| 502 | Odila | German | Elfin spear. | F | |
| 503 | Odile | German | Elfin spear. Can also be a feminine variant of Odo: Wealthy, or of Ottilia: of the fatherland; fortunate heroine. | F | |
| 504 | Olinda | German | Defender of the land. | F | |
| 505 | Ordalf | German | Elfin spear. | F | |
| 506 | Ordella | German | Elfin spear. | F | |
| 507 | Oriel | German | Compound of 'fire' and 'strife'. | F | |
| 508 | Otilie | German | Fortunate heroine. | F | |
| 509 | Otka | German | Fortunate heroine. | F | |
| 510 | Otthild | German | Fortunate heroine. | F | |
| 511 | Otthilda | German | Fortunate heroine. | F | |
| 512 | Otthilde | German | Fortunate heroine. | F | |
| 513 | Ottila | German | Fortunate heroine. | F | |
| 514 | Ottilia | German | Of the fatherland; fortunate heroine. | F | |
| 515 | Ottilie | German | Elfin spear. Can also be a feminine variant of Odo: Wealthy, or of Ottilia: of the fatherland; fortunate heroine. | F | |
| 516 | Otylia | German | Fortunate heroine. | F | |
| 517 | Patty | German | Diminutive of Matilda: Strength in battle. Matilda was the wife of William the Conqueror. Used in Australia as slang for a bushman's pack. | F | |
| 518 | Perahta | German | Glorious. | F | |
| 519 | Petronilla | German | Rock. | F | |
| 520 | Petronille | German | Rock. | F | |