| Name | Meaning | Gender | Origin |
|---|
| Garnet | Dark red gemstone | Female | |
| Ginger | A spice | Female | English |
| Gotham | | Unisex | Hebrew |
| Greebo | after the witch's cat in the Terry Pratchett discworld novels | Unisex | |
| Grey | Gray-Haired. | Male | English |
| Griddlebone | | Unisex | Hebrew |
| Griffin | strong lord | Male | Welsh |
| Growltiger | | Unisex | Hebrew |
| Gumball | | Unisex | Hebrew |
| Gummitch | | Unisex | Hebrew |
| Happy | Showing satisfaction or joy | Female | English |
| Harry | estate ruler | Male | English |
| Harry | estate ruler | Male | English |
| Heart | | Unisex | Hebrew |
| Hello Kitty | | Unisex | Hebrew |
| Itchy | | Unisex | Hebrew |
| Jake | From Jacob - To fill the place of another | Male | Hebrew |
| James | From Jacob - To fill the place of another, supplanter. | Male | English |
| Jasmine | Flower
| Female | Persian |
| Jellylorum | | Unisex | Hebrew |
| Jennie | English, God's gracious gift | Female | English |
| Jenny | Diminutive of Jane and Jennifer.
| Female | English |
| Jenny | Diminutive of Jane and Jennifer.
| Female | English |
| Jess | Gift | Male | English |
| Joe | Abbreviation of Joseph.
| Male | English |