Starting with letter O
| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 61 | Ono | Biblical | Grief or strength or iniquity of him. | F | |
| 62 | Oona | English | One. | F | |
| 63 | Oona | Irish | Variant of Oonagh: Lamb. Can also be an Irish variant of Latin Una: One. | F | |
| 64 | Oonagh | Irish | Lamb. Can also be an Irish variant of Latin Una': One. | F | |
| 65 | Oota dabun | NativeAmerican | Day star (Algonquin). | F | |
| 66 | Opal | English | Opal (precious stone). Jewel names became popular in the 19th century. | F | |
| 67 | Ophel | Biblical | A tower, darkness, small white cloud. | F | |
| 68 | Ophelia | Greek | Help. Serpentine. In Shakespeare's 'Hamlet', Ophelia was the lover of Hamlet who went insane as a result of his irrational behavior. | F | |
| 69 | Ophelia | Shakespearean | 'Hamlet, Prince of Denmark' Daughter to Polonius. | F | |
| 70 | Ophni | Biblical | Wearisomeness, folding together. | F | |
| 71 | Ops | Latin | Goddess of plenty. | F | |
| 72 | Ora | English | Beautiful seacoast. | F | |
| 73 | Oracula | Latin | Divine message. | F | |
| 74 | Orane | French | Rising. | F | |
| 75 | Orbona | Latin | Protectress of sick children. | F | |
| 76 | Orguelleuse | ArthurianLegend | An arrogant lady. | F | |
| 77 | Oriana | Latin | To rise; sunrise; dawn; golden. | F | |
| 78 | Oribel | Latin | Beautiful golden child. | F | |
| 79 | Oriel | German | Compound of 'fire' and 'strife'. | F | |
| 80 | Oris | Latin | Mother of Euphemus. | F | |