| # | Name | Origin | Meaning | Gender | Save |
|---|---|---|---|---|---|
| 1541 | Oona | Latin | One. | F | |
| 1542 | Oonagh | Latin | Only child; also can be a variant of Una: One. | F | |
| 1543 | Ops | Latin | Goddess of plenty. | F | |
| 1544 | Ora | Latin | Pray. | F | |
| 1545 | Oracula | Latin | Divine message. | F | |
| 1546 | Oralia | Latin | Golden. | F | |
| 1547 | Oralie | Latin | Golden. | F | |
| 1548 | Orbona | Latin | Protectress of sick children. | F | |
| 1549 | Orella | Latin | Divine message. | F | |
| 1550 | Oria | Latin | Golden. | F | |
| 1551 | Orial | Latin | Golden. | F | |
| 1552 | Oriana | Latin | To rise; sunrise; dawn; golden. | F | |
| 1553 | Oribel | Latin | Beautiful golden child. | F | |
| 1554 | Oribella | Latin | Beautiful golden child. | F | |
| 1555 | Oribelle | Latin | Beautiful golden child. | F | |
| 1556 | Oriel | Latin | Golden. | F | |
| 1557 | Oris | Latin | Mother of Euphemus. | F | |
| 1558 | Orlena | Latin | Golden. | F | |
| 1559 | Orlene | Latin | Golden. | F | |
| 1560 | Orphe | Latin | Lover of Dionysus. | F | |