| Name | Meaning | Gender | Origin |
|---|
| Jasper | Black stone
| Male | Persian |
| Jasper | Black stone
| Male | Persian |
| Jasper | Black stone
| Male | Persian |
| Javier | Born in January
| Male | Spanish |
| Jay | jaybird | Male | Latin |
| Jean | God is gracious | Male | |
| Jeff | pledge of peace | Male | English |
| Jeffrey | pledge of peace | Male | Spelling |
| Jen | White, Fair | Unisex | English |
| Jenna | white shadow, white wave | Female | English |
| Jennifer | white shadow, white wave | Female | Cornish |
| Jenny | Diminutive of Jane and Jennifer.
| Female | English |
| Jenny | Diminutive of Jane and Jennifer.
| Female | English |
| Jeremy | God will uplift, appointed by God | Male | English |
| Jerry | after Jerry Garcia, The Grateful Dead | Male | English |
| Jesper | Treasure | Unisex | Danish |
| Jesse | wealthy | Male | Hebrew |
| Jessica | God's grace | Female | Hebrew |
| Jillian | Jove's child. Variant of Gillian from the masculine Julian.
| Female | Phonetic |
| Jim | supplanter | Male | English |
| Jimmy | supplanter | Male | English |
| Jo | Variation of Johanna, God is gracious | Female | English |
| Joanna | after the character in The Rescuers Down Under cartoon | Female | English |
| Joe | Abbreviation of Joseph.
| Male | English |
| Joe | Abbreviation of Joseph.
| Male | English |