| Name | Meaning | Gender | Origin |
|---|
| Coby | Supplanter, Representative | Male | English |
| Hamish | Equivalent of Jacob - To fill the place of another. | Male | Scottish |
| Iago | Supplanter
| Male | Welsh |
| Jack | after the Georgetown University mascot, Jack the Bulldog | Male | English |
| Jack | From John - God's gracious gift | Male | English |
| Jackie | supplanter | Female | English |
| Jacky | God Is Gracious | Unisex | English |
| Jaco | Hebrew, supplanter | Male | Portuguese |
| Jacques | supplanter | Male | |
| Jago | A character in a Victorian book who battled against the odds | Male | Spanish |
| Jake | From Jacob - To fill the place of another | Male | Hebrew |
| Jakob | Supplanter, Representative | Unisex | German |
| Jakov | Supplanter, Representative | Unisex | Slavic |
| James | From Jacob - To fill the place of another, supplanter. | Male | English |
| Jamie | Feminine of James | Female | Scottish |
| Jay | jaybird | Male | Latin |
| Jim | supplanter | Male | English |
| Jock | God has been gracious: has shown favor. Based on John or Jacques.
| Male | Scottish |
| Seamus | supplanter | Male | Irish |
| Shamus | Supplanter | Male | Anglicized |