| Name | Meaning | Gender | Origin |
|---|
| Gator | | Male | Hebrew |
| Gavin | White hawk
| Male | Celtic |
| Gazpacho | | Unisex | Hebrew |
| Gem | A mineral that has been cut and polished | Unisex | |
| George | Farmer. In medieval legend St. George: (the knight who became patron saint of England) struggled with a fire-breathing dragon symbolizing the Devil.
| Male | Greek |
| Geronimo | Greek, sacred name | Male | Native |
| Gilbert | Bright lad. Gilberto: (Spanish) Bright lad.
| Male | |
| Gimli | after the dwarf in Lord of the Rings | Unisex | |
| Gizmo | A mechanical device or gadget. | Unisex | |
| Gobi | | Unisex | Hebrew |
| Goblin | | Male | Hebrew |
| Godfather | | Unisex | Hebrew |
| Gordo | | Unisex | Hebrew |
| Gotham | | Unisex | Hebrew |
| Gremlin | | Unisex | Hebrew |
| Greyson | son of the steward | Male | English |
| Grimalkin | | Unisex | Hebrew |
| Gris | Grey. | Unisex | |
| Gris | Grey. | Unisex | |
| Gris-Gris | | Unisex | |
| Grizabella | | Unisex | Hebrew |
| Grunt | To utter a deep, guttural sound. | Unisex | |
| Guinness | Brand of stout beer from Ireland. | Unisex | |
| Gus | From Gustave - Staff of the Goths | Male | English |
| Guster | | Unisex | Hebrew |