Starting with letter O
| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 21 | Odessa | Greek | Wrathful. | F | |
| 22 | Odessa | Latin | Wandering; quest. Variant of Odysseus. | F | |
| 23 | Odette | German | Variant of Ottilia: Of the fatherland; fortunate heroine. Can also be a feminine variant of Odo: Wealthy. | F | |
| 24 | Odile | German | Elfin spear. Can also be a feminine variant of Odo: Wealthy, or of Ottilia: of the fatherland; fortunate heroine. | F | |
| 25 | Odra | Indian | From Odra. | F | |
| 26 | Oenone | Greek | Lover of Paris. | F | |
| 27 | Oifa | Celtic | Mythical sister of Ove. | F | |
| 28 | Oihane | Spanish | From the forest. | F | |
| 29 | OIwyna | Welsh | White foot print. | F | |
| 30 | OJufemi | Egyptian | Beloved of the gods. | F | |
| 31 | Ola | Hawaiian | Life; well-being. | F | |
| 32 | Olaug | Norse | Of the ancestors. | F | |
| 33 | Oldwin | English | Special friend. | F | |
| 34 | Oleisia | Greek | Protector of man. | F | |
| 35 | Olesia | Polish | Polish form of Alexandra: defends mankind. | F | |
| 36 | Oletha | English | Light; nimble. | F | |
| 37 | Olexa | Czechoslovakian | Feminine of Alexander. | F | |
| 38 | Olga | Teutonic | Holy object. | F | |
| 39 | Olinda | German | Defender of the land. | F | |
| 40 | Oliva | Latin | Variant of Olive: Olive: symbol of peace. | F | |