| Name | Meaning | Gender | Origin |
|---|
| Finn | Blond
| Male | Irish |
| Flash | To move rapidly. | Male | Word |
| Fluffy | Covered with fluff, Soft, light and airy. | Unisex | |
| Fluke | | Unisex | Hebrew |
| Foster | forest keeper | Male | Occupational |
| Frankie | Diminutive of Frank Free: a free man. Frankie is occasionally used for girls.
| Male | |
| Friday | | Male | Hebrew |
| Fritz | German form of Frederick
| Male | |
| Fritz | German form of Frederick
| Male | |
| Frosty | Covered with white frost. Cold in manner | Male | |
| Fudge | A soft, rich candy | Male | |
| Gabby | Strength Of God | Unisex | English |
| Gadget | | Male | Hebrew |
| Galileo | from Galilee | Male | Italian |
| Ghost | A haunting spirit or memory. One who moves noiselessly. | Unisex | |
| Gibbs | | Unisex | Hebrew |
| Gizmo | A mechanical device or gadget. | Unisex | |
| Good Luck | | Unisex | |
| Gotham | | Unisex | Hebrew |
| Graphite | | Unisex | Hebrew |
| Grimalkin | | Unisex | Hebrew |
| Guenhwyvar | | Unisex | Hebrew |
| Guinness | Brand of stout beer from Ireland. | Unisex | |
| Hades | World of the dead or hell. | Male | |
| Halloween | | Unisex | Hebrew |