| Johnathon | Man | English Names |
| Johnson | Man | English Names |
| Jolyon | Man | English Names |
| Jon | Man | English Names |
| Jonatha | Woman | English Names |
| Jondalar | Man | English Names |
| Jonny | Man | English Names |
| Jonty | Man | English Names |
| Josephina | Woman | English Names |
| Josh | Man | English Names |
| Joss | Unisex | English Names |
| Joyce | Woman | English Names |
| Jud | Man | English Names |
| Judaea | Unisex | English Names |
| Judd | Man | English Names |
| Jude | Unisex | English Names |
| Judge | Man | English Names |
| Judson | Man | English Names |
| Judy | Woman | English Names |
| Julianna | Woman | English Names |