First names with first character O - alphabetically sorted
| First name | Origin | Rating |
|---|---|---|
| Oafe | African - Ishan of Nigeria | 0 out of 0 votes |
| Oak | American | 0 out of 0 votes |
| Oakes | English | 0 out of 0 votes |
| Oakley | English | 0 out of 0 votes |
| Oaklynn | American | 0 out of 0 votes |
| Oba | African - Nigeria | 0 out of 0 votes |
| Obadia | Hebrew | 1.85 out of 13 votes |
| Obadiah | Hebrew | 0 out of 0 votes |
| Obedience | English | 0 out of 0 votes |
| Obelia | Greek | 0 out of 0 votes |