| Name | Meaning | Gender | Origin |
|---|
| Ian | Form of John | Male | Scottish |
| Ichabod | Glory has Departed | Male | Hebrew |
| Jack Jack | | Unisex | Hebrew |
| Jack Sparrow | | Unisex | Hebrew |
| Jacques | supplanter | Male | |
| Jafar | little stream | Unisex | |
| Jake | From Jacob - To fill the place of another | Male | Hebrew |
| James | From Jacob - To fill the place of another, supplanter. | Male | English |
| Jane | gracious, merciful, God is gracious | Female | English |
| Jasmine | Flower
| Female | Persian |
| Jasper | Black stone
| Male | Persian |
| Jasper | Black stone
| Male | Persian |
| Jasper | Black stone
| Male | Persian |
| Jeff | pledge of peace | Male | English |
| Jennifer | white shadow, white wave | Female | Cornish |
| Jenny | Diminutive of Jane and Jennifer.
| Female | English |
| Jenny | Diminutive of Jane and Jennifer.
| Female | English |
| Jessie | wealthy | Female | Anglicized |
| Jim | supplanter | Male | English |
| Jiminy | | Unisex | Hebrew |
| Joanna | after the character in The Rescuers Down Under cartoon | Female | English |
| Jock | God has been gracious: has shown favor. Based on John or Jacques.
| Male | Scottish |
| John | God is merciful | Male | Hebrew |
| Joshua | God is salvation
| Male | Hebrew |
| Jumbo | Unusually large person, animal or thing e.g. Jumbo Jet. From African 'jumba' meaning elephant. | Male | |