| Jötunn | Man | Scandinavian Names |
| Jourdain | Unisex | French Names |
| Journey | Unisex | American Names |
| Jovan | Man | Slavic Names |
| Jovana | Woman | Slavic Names |
| Jovanna | Woman | Slavic Names |
| Jovany | Unisex | American Names |
| Jove | Man | Latin Names |
| Jovelyn | Woman | American Names |
| Jovia | Woman | Latin Names |
| Jovian | Man | Latin Names |
| Jovianne | Woman | French Names |
| Jovie | Woman | American Names |
| Jovienne | Woman | French Names |
| Jovita | Woman | Latin Names |
| Jowan | Man | English - Cornish Names |
| Joweese | Unisex | Native American - Seneca Names |
| Joy | Woman | Latin Names |
| Joyce | Woman | English Names |
| Joycelyn | Woman | American Names |