Starting with letter O
| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 161 | Oonagh | Irish | Lamb. Can also be an Irish variant of Latin Una': One. | F | |
| 162 | Oonagh | Latin | Only child; also can be a variant of Una: One. | F | |
| 163 | Oota dabun | NativeAmerican | Day star (Algonquin). | F | |
| 164 | Opal | English | Opal (precious stone). Jewel names became popular in the 19th century. | F | |
| 165 | Opal | Sanskrit | Jewel. | F | |
| 166 | Opalina | Sanskrit | Jewel. | F | |
| 167 | Opaline | Sanskrit | Jewel. | F | |
| 168 | Opel | Sanskrit | Jewel. | F | |
| 169 | Ophel | Biblical | A tower, darkness, small white cloud. | F | |
| 170 | Ophelia | French | Serpentine. | F | |
| 171 | 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 | |
| 172 | Ophelia | Shakespearean | 'Hamlet, Prince of Denmark' Daughter to Polonius. | F | |
| 173 | Ophelie | French | Serpentine. | F | |
| 174 | Ophelie | Greek | Wisdom. | F | |
| 175 | Ophni | Biblical | Wearisomeness, folding together. | F | |
| 176 | Ophra | Hebrew | Fawn. | F | |
| 177 | Ophrah | Hebrew | Fawn. | F | |
| 178 | Oprah | Hebrew | Fawn. | F | |
| 179 | Ops | Latin | Goddess of plenty. | F | |
| 180 | Ora | Anglo-Saxon | Money. | F | |