| Name | Meaning | Gender | Origin |
|---|
| George | Earth worker | Male | Greek |
| Gidget | | Unisex | Hebrew |
| Gil | Happiness | Male | Hebrew |
| Gillespie | Servant of the bishop | Male | Gaelic |
| Gilmore | Servant of the Virgin Mary | Male | Gaelic |
| Girlie | Girl | Unisex | English |
| Gizmo | A mechanical device or gadget. | Unisex | English |
| Godzilla | | Unisex | Hebrew |
| Goliath | Tall | Unisex | Hebrew |
| Gollum | | Unisex | Hebrew |
| Gonzo | Bizarre, unconventional, oddball. | Unisex | English |
| Goober | Southern US term for peanut. Also chocolate covered peanuts | Unisex | English |
| Grady | Child of nobility | Male | Gaelic |
| Green | The colour green | Unisex | English |
| Gucci | | Unisex | Hebrew |
| Guido | Forest | Male | Germanic |
| Gus | From Gustave - Staff of the Goths | Male | English |
| Guthrie | Windy | Male | English |
| Hagan | Enclosure | Male | German |
| Halla | An unexpected present | Unisex | African |
| Hank | God is gracious | Male | Hebrew |
| Happy | Showing satisfaction or joy | Unisex | English |
| Hardy | Strong, hardy | Male | Germanic |
| Harley | Hare clearing | Male | English |
| Henry | Home ruler | Male | Germanic |
| Herbie | Bright army | Unisex | English |
| Hercules | Grandiose gift | Male | Greek |
| Hogan | Descendent of Ogan | Male | Gaelic |
| Homer | Pledge or hostage | Male | Greek |
| Hoover | Owner of a measure of land | Unisex | German |