| Name | Meaning | Gender | Origin |
|---|
| Firefly | Nocturnal beetle with a flourescent abdomen that looks like a flash light. | Male | |
| Flame | A glowing mass of burning gas or vapor | Male | Word |
| Flannel | | Unisex | Hebrew |
| Flash | To move rapidly. | Male | Word |
| Flicka | | Unisex | Hebrew |
| Flint | born near outcrop of flint | Male | English |
| Fluffy | Covered with fluff, Soft, light and airy. | Unisex | |
| Fluke | | Unisex | Hebrew |
| Fonzie | Abbreviation of Alfonso.
| Male | |
| Forest | out of the woods | Male | |
| Fox | A carnivorous mammal, related to the Dog, that has a long bushy tail. | Male | Animal |
| Frankie | Diminutive of Frank Free: a free man. Frankie is occasionally used for girls.
| Male | |
| Freak | | Unisex | Hebrew |
| Fred | From Frederick - Peaceful ruler. | Male | |
| Freddie | peaceful ruler | Male | Dininutive |
| Frenzy | | Unisex | Hebrew |
| Freud | | Unisex | Hebrew |
| Frisky | | Unisex | Hebrew |
| Frog | Tailless amphibian having webbed feet and long hind legs. | Unisex | |
| Furball | | Male | Hebrew |
| Furby | | Unisex | Hebrew |
| Furrari | | Unisex | Hebrew |
| Gadget | | Male | Hebrew |
| Garfield | Famous comis strip character. English: From the triangular field.
| Male | English |
| Gato | | Unisex | Hebrew |