| Jiva | Unisex | Indian Names |
| Jnyah | Woman | American Names |
| Jo | Unisex | Hebrew Names |
| Joachim | Man | Hebrew Names |
| Joan | Woman | Hebrew Names |
| Joanie | Woman | English Names |
| Joann | Woman | English Names |
| Joanna | Woman | English Names |
| Joanne | Woman | English Names |
| Joao | Man | Portuguese Names |
| Joaquin | Man | Spanish Names |
| Joash | Man | Hebrew Names |
| Job | Man | Hebrew Names |
| Jobeth | Woman | American Names |
| Jobi | Unisex | American Names |
| Jocasta | Woman | Greek Names |
| Jocelin | Unisex | French Names |
| Jocelyn | Woman | English Names |
| Joceran | Man | German - Old Saxon Names |
| Jochebed | Woman | Hebrew Names |