Starting with letter O
| # | Name | Origin | Meaning | Gender | Save |
|---|---|---|---|---|---|
| 241 | Ortygia | Greek | Calypso's island. | F | |
| 242 | Orva | Anglo-Saxon | Brave friend. | F | |
| 243 | Orva | English | Special friend. | F | |
| 244 | Orva | French | Worth gold. | F | |
| 245 | Orynko | Ukrainian | Peace. | F | |
| 246 | Orzora | Hebrew | God's strength. | F | |
| 247 | Orzsebet | Hebrew | Devoted to God. | F | |
| 248 | Orzsebet | Hungarian | Form of Elizabeth: consecrated to God. | F | |
| 249 | Osana | Spanish | Health. | F | |
| 250 | Osane | Basque | Health. | F | |
| 251 | Osane | Spanish | Health. | F | |
| 252 | Osberga | Anglo-Saxon | Name of a queen. | F | |
| 253 | Osburga | Anglo-Saxon | Name of a queen. | F | |
| 254 | Oseye | Egyptian | Happy. | F | |
| 255 | Osk | Norse | Mother of Hild. | F | |
| 256 | Otha | Anglo-Saxon | Little wealthy one. | F | |
| 257 | Othili | Anglo-Saxon | Little wealthy one. | F | |
| 258 | Otilie | German | Fortunate heroine. | F | |
| 259 | Otka | Czechoslovakian | Lucky. | F | |
| 260 | Otka | German | Fortunate heroine. | F | |