| Name | Meaning | Gender | Origin |
|---|
| Janet | Variant of Jane | Female | English |
| Jaromir | Spring, Favor | Unisex | Czechoslovakian |
| Jason | the Lord is salvation | Male | Hebrew |
| Javier | Born in January
| Male | Spanish |
| Jax | God has been gracious: has shown favor. Based on John or Jacques.
| Male | Modern |
| Jay | jaybird | Male | Latin |
| Jean | God is gracious | Male | |
| Jean-Claude | | Unisex | Hebrew |
| Jeff | pledge of peace | Male | English |
| Jeffrey | pledge of peace | Male | Spelling |
| 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 |
| Jeremy | God will uplift, appointed by God | Male | English |
| Jerome | sacred name | Male | Greek |
| Jerry | after Jerry Garcia, The Grateful Dead | Male | English |
| Jerzy | farmer | Male | Polish |
| Jesse | wealthy | Male | Hebrew |
| Jessica | God's grace | Female | Hebrew |
| Jet | A deep black colour. Aircraft engine that propels an aircraft forward by expelling exhaust gases toward the rear. | Male | Mineral |
| Jeter | after Derek Sanderson Jeter, Yankee's shortstop | Male | |
| Jim | supplanter | Male | English |
| Jimmy | supplanter | Male | English |