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| NAME | MEANING | GENDER | ORIGIN |
| OLENCIA | Not available | F� | American� |
| OLESIA | Protector of Humanity | F� | Polish� |
| OLGA | Holy | F� | Slavic� |
| OLIANA | From Oleander | F� | Hawaiian� |
| OLIN | Of the Ancestors | E� | Scandinavian� |
| OLINA | Joyous | F� | Hawaiian� |
| OLINDA | Form of YOLANDA | F� | Latin� |
| OLISA | God | F� | Native American� |
| OLIVE | Olive Branch, Peace | F� | Latin� |
| OLIVER | Olive Tree- Peace | M� | Latin� |
| OLIVIA | Peace - of the olive tree | F� | Latin� |
| OLLIE | From the name OLIVER | M� | Greek� |
| OLWEN | White footprint | F� | Welsh� |
| OLYMPE | Olympian | F� | French� |
| OLYMPIA | Mountain of the Gods | F� | Greek� |
| OMA | Giver of Life | M� | Arabic� |
| OMANA | A Woman | F� | Sanskrit (India)� |
| OMANAND | Joy of Om | M� | Sanskrit (India)� |
| OMAR | Ultimate Devotee | M� | Arabic� |
| OMEGA | Last | E� | Greek� |
| ON | Peace | M� | Chinese� |
| ONA | Full of Grace | F� | Latin� |
| ONAEDO | Gold | F� | African� |
| ONAN | Wealthy | M� | Turkish� |
| ONAONA | Sweet Smell | F� | Hawaiian� |
| ONAWA | Awake | F� | Native American� |
| ONDREA | Strong, Courageous | F� | Slavic� |
| ONEIDA | Eagerly awaited | F� | Native American� |
| ONELLA | Torch Light | F� | Hungarian� |
| ONI | Born on Holy Ground | F� | Native American� |
| ONOFRE | Defender of Peace | M� | Spanish� |
| ONSLOW | Hill of the Passionate One | M� | Arabic� |
| ONTIBILE | God is Watching Over Me | F� | African� |
| OONA | One | F� | Celtic/Gaelic� |
| OPA | Owl | F� | Native American� |
| OPAL | Precious gem | F� | Sanskrit (India)� |
| OPHELIA | Helper | F� | Greek� |
| OPHIRA | Gold | F� | Greek� |
| OPHRAH | Light | F� | Hebrew� |
| OPRAH | Runaway | F� | Hebrew� |
| ORA | Gold | F� | Spanish� |
| ORACLE | Prophecy | E� | Greek� |
| ORAL | Speaker, Word | M� | Latin� |
| ORALEE | Lord Is My Light | F� | Hebrew� |
| ORAN | Green | E� | Celtic/Gaelic� |
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