| Name | Meaning | Gender | Origin |
|---|
| Jack | From John - God's gracious gift | Male | English |
| Jacob | The supplanter, held by the heel | Male | Hebrew |
| James | From Jacob - To fill the place of another, supplanter. | Male | English |
| Jamie | Feminine of James | Female | Scottish |
| Jane | gracious, merciful, God is gracious | Female | English |
| Jay | jaybird | Male | Latin |
| Jean | God is gracious | Male | |
| Jeff | pledge of peace | Male | English |
| Jeffrey | pledge of peace | Male | Spelling |
| Jeremiah | Exalted of the Lord
| Male | Hebrew |
| Jeremy | God will uplift, appointed by God | Male | English |
| Jill | youthful | Female | English |
| Jim | supplanter | Male | English |
| Joel | God is willing, Jehova is the Lord | Male | Hebrew |
| John | God is merciful | Male | Hebrew |
| Jolie | French for pretty | Female | |
| Jonas | Dove. Variant of Hebrew Jonah.
| Male | Greek |
| Joseph | God will increase | Male | Hebrew |
| Judd | praised | Male | Medieval |
| Justus | Just | Male | Roman |
| Kaka | | Unisex | Hebrew |
| Kao | | Unisex | Hebrew |
| Karen | pure | Female | Danish |
| Keith | wood, wind; wood-dweller | Male | Scottish |
| Ken | Male Barbie Doll. | Male | English |