| Name | Meaning | Gender | Origin |
| Olisa | God | F | Native American |
| Olita | Winged. | F | English |
| Olithia | Honest. | F | Latin |
| Oliva | Variant of Olive: Olive: symbol of peace. | F | Latin |
| Olive | Olive Branch/ Peace | F | Latin |
| Oliver | Olive Tree- Peace | M | Latin |
| Oliveria | Affectionate. | F | Spanish |
| Oliverio | Peaceful. | M | Latin |
| Oliverios | Peaceful. | M | Latin |
| Olivia | Peace - of the olive tree | F | Latin |
| Olivie | Olive. | F | Latin |
| Olivier | From the olive tree. | M | French |
| Ollaneg | From Olney. | M | English |
| Ollie | From the name OLIVER | M | Greek |
| Olliver | Peaceful. | M | Latin |
| Olney | From Olney. | M | English |
| Olof | Relic. | M | Norse |
| Olufemi | Beloved of the gods. | F | Egyptian |
| Olvaerr | Affectionate. | M | Norse |
| Olvan | Peaceful. | M | Latin |
| Olvir | Affectionate. | M | Norse |
| Olwen | White footprint | F | Welsh |
| Olwina | White foot print. | F | Welsh |
| Olwydd | Tracker. | M | Welsh |
| Olwyn | Daughter of a giant. | F | Arthurian Legend |
| Olya | Holy. | F | Russian |
| Olympas | Heavenly. | F | Biblical |
| Olympe | Olympian | F | French |
| Olympia | Mountain of the Gods | F | Greek |
| Olyn | Relic. | M | Norse |
| Om | Father of Idunn. | M | Norse |
| Oma | Commander | M | Arabic |
| Omah | Cedar tree. | F | Hebrew |
| Omana | A Woman | F | Hindi |
| Omar | Ultimate Devotee | M | Arabic |
| Omari | God the highest (Swahili). | M | African |
| Omarr | God the highest (Swahili). | M | African |
| Omat | The color of olive. | F | Irish |
| Omawnakw | Cloud feather (Hopi). | M | Native American |
| Omeet | My light. | M | Hebrew |
| Omega | Last | E | Greek |
| Omer | First son. | M | Arabic |
| Omet | My light. | M | Hebrew |
| Omette | Cedar tree. | F | Hebrew |
| Ominotago | Beautiful voice (Chippewa). | F | Native American |
| Ommar | First son. | M | Arabic |
| Omolf | Son of Armod. | M | Norse |
| Omora | Honor. | F | Latin |
| Omoria | Honor. | F | Latin |
| Omorose | Beautiful. | F | Egyptian |