| Omana | Woman | Indian Names |
| Omanand | Man | Indian Names |
| Omar | Man | Hebrew Names |
| Omari | Man | Hebrew Names |
| Omarion | Man | American Names |
| Omarosa | Woman | African - Nigeria Names |
| Omega | Unisex | Greek Names |
| Omeo | Man | Aboriginal Names |
| Omer | Man | Hebrew Names |
| Ometaway | Man | Native American - Ojibwa Names |
| Ominotago | Woman | Native American - Chippewa Names |
| Omiros | Man | Greek Names |
| Omodara | Woman | African - Yoruba Names |
| Omolara | Woman | African - Nigeria Names |
| Omri | Man | Hebrew Names |
| On | Man | Chinese Names |
| Ona | Woman | Slavic Names |
| Onaedo | Woman | African - Ibo Names |
| Onan | Man | Hebrew Names |
| Onaona | Woman | Hawaiian Names |