| Jude | Unisex | English Names |
| Judge | Man | English Names |
| Judson | Man | English Names |
| Judy | Woman | English Names |
| Julianna | Woman | English Names |
| Juliet | Woman | English Names |
| July | Unisex | English Names |
| Junior | Man | English Names |
| Justice | Unisex | English Names |
| Justin | Man | English Names |
| Justine | Woman | English Names |
| Kailey | Woman | English Names |
| Kaleigh | Woman | English Names |
| Kaley | Unisex | English Names |
| Kallima | Woman | English Names |
| Kamber | Unisex | English Names |
| Karenza | Woman | English Names |
| Karman | Man | English Names |
| Karston | Man | English Names |
| Kasani | Unisex | English Names |