| Name | Meaning | Gender | Origin |
|---|
| Ian | Form of John | Male | Scottish |
| Ignatius | fiery | Male | Latin |
| Igor | Scottish variation of Welsh Ifor, lord or English form of Scandinavian Ifar, yew | Male | Russian |
| Isaac | laughing one | Male | Hebrew |
| Ivan | Form of John | Male | Russian |
| Jacob | The supplanter, held by the heel | Male | Hebrew |
| James | From Jacob - To fill the place of another, supplanter. | Male | English |
| Jareth | after Jareth the Goblin King in the movie 'Labyrinth' | Male | Hybrid |
| Jason | the Lord is salvation | Male | Hebrew |
| Jasper | Black stone
| Male | Persian |
| Jasper | Black stone
| Male | Persian |
| Jasper | Black stone
| Male | Persian |
| Jean | God is gracious | Male | |
| Jeffry | Peaceful. Variant Of Jeffrey. | Unisex | English |
| Jeremias | Exalted of the Lord
| Male | |
| Jerome | sacred name | Male | Greek |
| Jesse | wealthy | Male | Hebrew |
| Job | The Persecuted | Male | Hebrew |
| Joel | God is willing, Jehova is the Lord | Male | Hebrew |
| John | God is merciful | Male | Hebrew |
| Jonas | Dove. Variant of Hebrew Jonah.
| Male | Greek |
| Jordan | The descending river, to flow | Male | Hebrew |
| Joris | Dutch for George | Unisex | |
| Joseph | God will increase | Male | Hebrew |
| Jovian | | Unisex | Hebrew |