| Name | Meaning | Gender | Origin |
|---|
| Jess | Gift | Male | English |
| Jesse | wealthy | Male | Hebrew |
| Jessi | God Graciously Watches | Unisex | English |
| Jett | Jet Black Gem | Male | English |
| Jim | supplanter | Male | English |
| Jimmy | supplanter | Male | English |
| Jingles | | Unisex | Hebrew |
| Joaquin | Abbreviation of the Hebrew name Jehoichin meaning Jehovah has established. Joaquin Miller the colorful 19th century poet-adventurer of the American west.
| Male | Spanish |
| Jock | God has been gracious: has shown favor. Based on John or Jacques.
| Male | Scottish |
| Joe | Abbreviation of Joseph.
| Male | English |
| Joe | Abbreviation of Joseph.
| Male | English |
| John | God is merciful | Male | Hebrew |
| Johnny | the Lord is gracious | Male | English |
| Jolly | Full of good humor and high spirits. | Unisex | |
| Jonah | Dove. In the bible Jonah was on board a ship God caused to sink: sailors traditionally use the name Jonah to personify someone who brings bad luck.
| Male | Hebrew |
| Joseph | God will increase | Male | Hebrew |
| Josey | God Will Increase | Unisex | English |
| Josh | God Saves | Unisex | English |
| Judd | praised | Male | Medieval |
| Junior | Youthful person. Used to distinguish son from father where they have the same name | Male | Latin |
| Justin | just, true | Male | Latin |
| Keenan | Ancient
| Male | Irish |
| Keith | wood, wind; wood-dweller | Male | Scottish |
| Kelli | From The Wood | Unisex | Welsh |
| Ken | Male Barbie Doll. | Male | English |