| Name | Meaning | Gender | Origin |
|---|
| Imani | faith | Female | Arabic |
| Ivy | ivy plant, a wine | Female | Plant |
| Jasper | Black stone
| Male | Persian |
| Jasper | Black stone
| Male | Persian |
| Jasper | Black stone
| Male | Persian |
| Jemima | dove | Female | Hebrew |
| Jenga | | Unisex | Hebrew |
| Jingle | | Unisex | Hebrew |
| Jolie | French for pretty | Female | |
| Jolly | Full of good humor and high spirits. | Unisex | |
| Jonathan | God gives | Male | Hebrew |
| Joseph | God will increase | Male | Hebrew |
| Josephine | God will increase | Female | |
| Joy | From Joyce - Gay and joyful | Female | Word |
| Julian | Jove's child. Form of Julius and family clan name of several powerful Roman emperors. Biblical Roman centurion Julius saved Paul's life during a hazardous voyage
| Male | English |
| Juniper | Juniper Tree | Female | English |
| Karen | pure | Female | Danish |
| Kringle | | Unisex | |
| Kristopher | Greek and Latin, bearer of Christ | Male | Greek |
| Kwanzaa | | Unisex | Hebrew |
| Latke | after the character on the TV show Taxi | Unisex | |
| Lego | | Unisex | |
| Lenora | Italian diminutive of Eleonora or Eleanor, meaning unknown | Female | English |
| Linus | flaxen-haired | Male | Greek |
| Lou | Famous Warrior | Male | English |