- Flagler
- Flaherty
- Flaitel
- Flake
- Flamens
- Flanagan
- Flanders
- Flanders-Hainault
- Flask
- Flatt
- Fleet
- Fleming
- Flemming
- Flensburg
- Fletcher
- Flickner
- Flier
- Flint
- Flock
- Flohr
- Flom
- Flood
- Flores
- Flournoy
- Flower
- Flowers
- Floyd
- Flynn
- Fobes
- Focht
- Fogle
- Foglesong
- Foland
- Foley
- Follansby
- Folmar
- Folsom
- Fonda
- Fones
- Foose
- Foot
- Foote
- Forbes