Starting with letter O
| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 141 | Ominotago | NativeAmerican | Beautiful voice (Chippewa). | F | |
| 142 | Omora | Latin | Honor. | F | |
| 143 | Omoria | Latin | Honor. | F | |
| 144 | Omorose | Egyptian | Beautiful. | F | |
| 145 | Omphale | Greek | A queen of Lydia. | F | |
| 146 | Ona | Hebrew | Graceful. | F | |
| 147 | Ona | Irish | One. Also a variant of Una: Lamb; together. | F | |
| 148 | Ona | Latin | Only child; also can be a variant of Una: One. | F | |
| 149 | Onawa | NativeAmerican | Wide awake. | F | |
| 150 | Onella | Greek | Light. | F | |
| 151 | Onesiphorus | Biblical | Who brings profit. | F | |
| 152 | Oni | Egyptian | Wanted. | F | |
| 153 | Onida | NativeAmerican | The one searched for. | F | |
| 154 | Onit | Hebrew | Graceful. | F | |
| 155 | Ono | Biblical | Grief or strength or iniquity of him. | F | |
| 156 | Onora | Gaelic | Honor. | F | |
| 157 | Onora | Irish | Honor. | F | |
| 158 | Oona | English | One. | F | |
| 159 | Oona | Irish | Variant of Oonagh: Lamb. Can also be an Irish variant of Latin Una: One. | F | |
| 160 | Oona | Latin | One. | F | |