Starting with letter O
| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 181 | Onfroi | French | PeacefuI Hun. | M | |
| 182 | ONille | French | From the gold town. | M | |
| 183 | Onnan | Teutonic | Mariner. | M | |
| 184 | Ono | Biblical | Grief or strength or iniquity of him. | M | |
| 185 | Onslow | English | From the zealous one's hill. | M | |
| 186 | Onslowe | English | From the zealous one's hill. | M | |
| 187 | Onund | Norse | Son of Viking. | M | |
| 188 | Onuris | Egyptian | Brings back the distant one. | M | |
| 189 | Ony | Russian | Eagle. | M | |
| 190 | Ony | Slavic | Eagle. | M | |
| 191 | Ophel | Biblical | A tower, darkness, small white cloud. | M | |
| 192 | Ophion | Greek | A serpent. | M | |
| 193 | Ophir | Biblical | Fruitful region. | M | |
| 194 | Ophni | Biblical | Wearisomeness, folding together. | M | |
| 195 | Ophrah | Biblical | Dust, lead, a fawn. | M | |
| 196 | Orahamm | English | From tbe riverbank enclosure. | M | |
| 197 | Oral | Russian | Eagle. | M | |
| 198 | Oral | Slavic | Eagle. | M | |
| 199 | Oram | English | From tbe riverbank enclosure. | M | |
| 200 | Oran | Celtic | White. | M | |