Starting with letter O
| # | Name | Origin | Meaning | Gender | Save |
|---|---|---|---|---|---|
| 261 | Otrera | Latin | Mother of the Amazons. | F | |
| 262 | Ottavia | Italian | Born eighth. | F | |
| 263 | Otthild | German | Fortunate heroine. | F | |
| 264 | Otthilda | German | Fortunate heroine. | F | |
| 265 | Otthilde | German | Fortunate heroine. | F | |
| 266 | Ottila | German | Fortunate heroine. | F | |
| 267 | Ottilia | German | Of the fatherland; fortunate heroine. | F | |
| 268 | Ottilie | Anglo-Saxon | Little wealthy one. | F | |
| 269 | Ottilie | German | Elfin spear. Can also be a feminine variant of Odo: Wealthy, or of Ottilia: of the fatherland; fortunate heroine. | F | |
| 270 | Ottilie | Teutonic | Lucky battle maiden. | F | |
| 271 | Ottillia | Teutonic | Lucky battle maiden. | F | |
| 272 | Otylia | German | Fortunate heroine. | F | |
| 273 | Otylia | Polish | Lucky heroine. | F | |
| 274 | Oudsiyya | Muslim | Glorious. Holy.. | F | |
| 275 | Ourra-Tul-Ain | Muslim | Delight of eye. Darling.. | F | |
| 276 | Ove | Celtic | Mythical daughter of Dearg. | F | |
| 277 | Overdone | Shakespearean | 'Measure for Measure' Mistress Overdone, a bawd. | F | |
| 278 | Ovia | Latin | Egg. | F | |
| 279 | Owena | Welsh | Feminine form of Owen: Young warrior. Also can be a variant of Eugene: Well-born. | F | |