| Name | Meaning | Gender | Origin |
|---|
| Isabel | concecrated to God | Female | Spanish |
| Isabella | pledged to God | Female | Spanish |
| Isabelle | pledged to God | Female | |
| Isaiah | salvation of the Lord | Male | Hebrew |
| Jack | after the Georgetown University mascot, Jack the Bulldog | Male | English |
| Jack | From John - God's gracious gift | Male | English |
| Jackson | Son of Jack | Male | English |
| Jacob | The supplanter, held by the heel | Male | Hebrew |
| Jada | wise | Female | Spanish |
| Jade | Jewel. Courageous and adoring.
| Female | Spanish |
| Jagger | a teamster | Male | English |
| Jai | Victorious | Unisex | Hindu |
| James | From Jacob - To fill the place of another, supplanter. | Male | English |
| Jameson | son of James | 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 |
| Java | Brewed coffee | Female | Anglicization |
| Jax | God has been gracious: has shown favor. Based on John or Jacques.
| Male | Modern |
| Jeffrey | pledge of peace | Male | Spelling |
| Jenson | son of Jens | Male | Scandinavian |
| Jesse | wealthy | Male | Hebrew |
| Jett | Jet Black Gem | Male | English |