First names with first character O - Page 5
| First name | Origin | Rating |
|---|---|---|
| Omer | Bosnia | 2.53 out of 19 votes |
| Onuphrius | Greek | 2.71 out of 17 votes |
| Oona | Irish | 3.42 out of 12 votes |
| Opal | English | 5 out of 5 votes |
| Ophelia | Greek | 5.77 out of 26 votes |
| Optatus | Latin | 3.6 out of 10 votes |
| Orania | Latin | 3.9 out of 10 votes |
| Oranna | Irish | 2.93 out of 14 votes |
| Orell | switzerland | 3 out of 8 votes |
| Orest | Greek | 3.91 out of 11 votes |