| Name | Meaning | Gender | Origin |
|---|
| Jacqueline | Feminine form of Jacques
| Female | |
| Jacquelyn | Feminine of Jacques derived from James and Jacob.
| Female | |
| 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 |
| Jakov | Supplanter, Representative | Unisex | Slavic |
| Jamee | supplanter, one who replaces | Unisex | |
| James | From Jacob - To fill the place of another, supplanter. | Male | English |
| Jameson | son of James | Male | English |
| Jamie | Feminine of James | Female | Scottish |
| Jasmine | Flower
| Female | Persian |
| Jeffery | Peaceful. Variant of Geoffrey in use since medieval times.
| Male | |
| Jeffrey | pledge of peace | Male | Spelling |
| Jim | supplanter | Male | English |
| Jimena | Heard
| Female | Spanish |
| Jimmy | supplanter | Male | English |
| Jock | God has been gracious: has shown favor. Based on John or Jacques.
| Male | Scottish |
| Jonquil | Reed | Female | English |
| Juniper | Juniper Tree | Female | English |
| Kai | Fire
| Male | Hawaiian |
| Kalina | Flower
| Female | |
| Kaya | my elder sister | Female | Native |
| Kelila | laurel, crown | Female | Hebrew |
| Kezia | cassia, cinnamon | Female | Hebrew |
| Keziah | cassia tree | Female | Hebrew |