| Latin baby names begining from O |
| Octavia |
 | Born Eighth. In the Roman Empire, Octavia was the sister of Octavian who was married to Mark Antony (as a political alliance). They were later divorced (in 32 BC). |
| Octavian |
 | Variant of Octavius: Born eighth. Octavian was the name used commonly for the Emperor Augustus. |
| Octaviana |
| Eighth. Feminine of Octavius. A clan name of Roman Emperors. |
| Octavie |
| Born eighth. |
| Octavio |
| Eighth. |
| Octavius |
| Born eighth. Octavius was a Roman clan name, as well as the original name of Emperor Augustus (commonly known as Octavian). Traditionally, this name was given to the eighth child in a large family. |
| Ocyale |
| An Amazon. |
| Odessa |
| Wandering; quest. Variant of Odysseus. |
| Oenone |
| Daughter of Cebren. |
| Oetavian |
| Born eighth. |
| OIethe |
| Honest. |
| Oistin |
| Revered. |
| Olethea |
| Honest. |
| Olethia |
| Honest. |
| Olinda |
| Fragrant. |
| Olithia |
| Honest. |
| Oliva |
| Variant of Olive: Olive: symbol of peace. |
| Olive |
| Symbol of peace. |
| Oliver |
| Olive (symbol of peace); peaceful. |
| Oliverio |
| Peaceful. |
| Oliverios |
| Peaceful. |
| Olivia |
| Variant of Olive: Olive: symbol of peace. |
| Olivie |
| Olive. |
| Olivier |
| Variant of Oliver: Olive (symbol of peace); peaceful. |
| Ollie |
 | Diminutive of Olive: Olive: symbol of peace. |
| Ollie |
| Diminutive of Oliver: Olive (symbol of peace); peaceful. |
| Olliver |
| Peaceful. |
| Olvan |
| Peaceful. |
| Oma |
| Named for Bona Dea. |
| Omora |
| Honor. |
| Omoria |
| Honor. |
| Ona |
| Only child; also can be a variant of Una: One. |
| Oona |
| One. |
| Oonagh |
| Only child; also can be a variant of Una: One. |
| Ops |
| Goddess of plenty. |
| Ora |
| Pray. |
| Oracula |
| Divine message. |
| Oralia |
| Golden. |
| Oralie |
| Golden. |
| Orban |
| Born in the city. |
| Orbona |
| Protectress of sick children. |
| Orcus |
| The mythical underworld. |
| Orella |
| Divine message. |
| Oria |
| Golden. |
| Orial |
| Golden. |
| Oriana |
| To rise; sunrise; dawn; golden. |
| Oribel |
| Beautiful golden child. |
| Oribella |
| Beautiful golden child. |
| Oribelle |
| Beautiful golden child. |
| Oriel |
| Golden. |
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