Starting with letter O
| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 81 | Oldwyn | English | Special friend. | F | |
| 82 | Olechka | Russian | Holy. | F | |
| 83 | Oleda | English | Winged. | F | |
| 84 | Oleisia | Greek | Protector of man. | F | |
| 85 | Olena | Greek | Light. | F | |
| 86 | Olena | Russian | Light. | F | |
| 87 | Olenka | Russian | Holy. | F | |
| 88 | Olesia | Polish | Polish form of Alexandra: defends mankind. | F | |
| 89 | Oleta | English | Winged. | F | |
| 90 | Oletha | English | Light; nimble. | F | |
| 91 | Olethea | Latin | Honest. | F | |
| 92 | Olethia | Latin | Honest. | F | |
| 93 | Olexa | Czechoslovakian | Feminine of Alexander. | F | |
| 94 | Olexa | English | Defender of mankind. Feminine of Alexander. | F | |
| 95 | Olexa | Greek | Defender of mankind. Feminine of Alexander. | F | |
| 96 | Olga | Norse | Holy. | F | |
| 97 | Olga | Russian | Holy. | F | |
| 98 | Olga | Scandinavian | Blessed. | F | |
| 99 | Olga | Swedish | Holy. | F | |
| 100 | Olga | Teutonic | Holy object. | F | |