| Name | Meaning | Gender | Origin |
|---|
| Jen | White, Fair | Unisex | English |
| Jenna | white shadow, white wave | Female | English |
| Jennie | English, God's gracious gift | 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 |
| Jill | youthful | Female | English |
| Jim | supplanter | Male | English |
| Jimbo | Supplanter, Representative | Unisex | Hebrew |
| Jimmy | supplanter | Male | English |
| Joe | Abbreviation of Joseph.
| Male | English |
| Joe | Abbreviation of Joseph.
| Male | English |
| Joel | God is willing, Jehova is the Lord | Male | Hebrew |
| Joey | Abbreviation of Joseph.
| Male | |
| Joey | Abbreviation of Joseph.
| Male | |
| John | God is merciful | Male | Hebrew |
| Johnny | the Lord is gracious | Male | English |
| Jojo | | Female | Hebrew |
| Jon | God is gracious; or gift of Jehovah | Male | English |
| Jonah | Dove. In the bible Jonah was on board a ship God caused to sink: sailors traditionally use the name Jonah to personify someone who brings bad luck.
| Male | Hebrew |
| Jonathan | God gives | Male | Hebrew |
| Jordan | The descending river, to flow | Male | Hebrew |
| Joseph | God will increase | Male | Hebrew |
| Joshua | God is salvation
| Male | Hebrew |
| Julia | Youthful
| Female | Latin |