| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 2421 | Oliver | Latin | Olive (symbol of peace); peaceful. | M | |
| 2422 | Oliverio | Latin | Peaceful. | M | |
| 2423 | Oliverios | Latin | Peaceful. | M | |
| 2424 | Olivia | Latin | Variant of Olive: Olive: symbol of peace. | F | |
| 2425 | Olivie | Latin | Olive. | F | |
| 2426 | Olivier | Latin | Variant of Oliver: Olive (symbol of peace); peaceful. | M | |
| 2427 | Ollie | Latin | Diminutive of Olive: Olive: symbol of peace. | F | |
| 2428 | Ollie | Latin | Diminutive of Oliver: Olive (symbol of peace); peaceful. | M | |
| 2429 | Olliver | Latin | Peaceful. | M | |
| 2430 | Olvan | Latin | Peaceful. | M | |
| 2431 | Oma | Latin | Named for Bona Dea. | F | |
| 2432 | Omora | Latin | Honor. | F | |
| 2433 | Omoria | Latin | Honor. | F | |
| 2434 | Ona | Latin | Only child; also can be a variant of Una: One. | F | |
| 2435 | Oona | Latin | One. | F | |
| 2436 | Oonagh | Latin | Only child; also can be a variant of Una: One. | F | |
| 2437 | Ops | Latin | Goddess of plenty. | F | |
| 2438 | Ora | Latin | Pray. | F | |
| 2439 | Oracula | Latin | Divine message. | F | |
| 2440 | Oralia | Latin | Golden. | F | |