| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 501 | Flavio | Latin | Variant of Flavian: Yellow-haired. | M | |
| 502 | Flawiusz | Latin | Yellow. | M | |
| 503 | Floren | Latin | Flowering. | M | |
| 504 | Florentin | Latin | Flowering. | M | |
| 505 | Florentyn | Latin | Flowering. | M | |
| 506 | Florian | Latin | Flowery or flourishing. Famous bearer: Fourth century Roman martyr St. Florian. | M | |
| 507 | Florien | Latin | Variant of Florian: In bloom. | M | |
| 508 | Florino | Latin | Variant of Florian: In bloom. | M | |
| 509 | Floryan | Latin | Variant of Florian: In bloom. | M | |
| 510 | Fonsie | Latin | Abbreviation of Alfonso. | M | |
| 511 | Fonso | Latin | Abbreviation of Alfonso. | M | |
| 512 | Fonzell | Latin | Abbreviation of Alfonso. | M | |
| 513 | Fonzie | Latin | Abbreviation of Alfonso. | M | |
| 514 | Fonzo | Latin | Abbreviation of Alfonso. | M | |
| 515 | Forrest | Latin | Dwells in the forest. | M | |
| 516 | Fortino | Latin | Strong; fortunate. | M | |
| 517 | Fortunato | Latin | Strong; fortunate. | M | |
| 518 | Fortunatus | Latin | Lucky or prosperous. | M | |
| 519 | Foster | Latin | Keeper of the forest. | M | |
| 520 | Fran | Latin | Diminutive of Francis: meaning from France, or free one. | M | |