| Jock | Man | English Names |
| Jodell | Woman | American Names |
| Jodge | Unisex | American Names |
| Jody | Unisex | English Names |
| Joe | Man | English Names |
| Joed | Unisex | Hebrew Names |
| Joel | Man | Hebrew Names |
| Joella | Woman | Hebrew Names |
| Joelle | Woman | French Names |
| Joely | Woman | English Names |
| Joey | Unisex | English Names |
| Joffrey | Man | English Names |
| Johan | Man | German Names |
| Johann | Man | German Names |
| Johanna | Woman | German Names |
| Johanne | Woman | Scandinavian Names |
| Johannes | Man | Scandinavian Names |
| Johari | Woman | Swahili Names |
| John | Man | Hebrew Names |
| Johnathan | Man | Hebrew Names |