| 092 | FAULKNER | Redruth | c1814 | |||||
| 453 | FERRETT | Tresmere / Any | Early19C | |||||
| 205 | FIFE | Armagh, Ireland | All | |||||
| 239 | FILP | Cornwall | c1700s | |||||
| 205 | FINLAY | Edinburgh | 1600+ | |||||
| 085 | FIRKIN | St. Enoder / St. Columb | pre1700s | |||||
| 205 | FISHER | Morthill / Maulden | 1600+ | |||||
| 205 | FLOOD | Carterton, New Zealand | All | |||||
| 682 | FLOYD (Isaac) | Phillack | c1780 | |||||
| 682 | FLOYD | Cornwall | 1700-1850 | |||||
| 605 | FOOKES | Cornwall | All | |||||
| 605 | FOOT + var. | Veryan | All | |||||
| 605 | FOOTE + var. | Cornwall | All | |||||
| 739 | FORD | Wadebridge/Egloshayle | 1850+ | |||||
| 583 | FORD + var. | Creed | 1600-1850 | |||||
| 583 | FORD + var. | Probus | 1775-1900 | |||||
| 583 | FORD + var. | Grampound / St. Ewe | 1800-1900 | |||||
| 583 | FORD + var. | Cornelly / Veryan | 1850-1950 | |||||
| 583 | FORD + var. | Tregony | 1850-1950 | |||||
| 583 | FORD + var. | East Lothian | 1875-1950 | |||||
| 583 | FORD + var. | Mevagissey | 1850-1950 | |||||
| 205 | FORSYTHE | Oxnam, Scotland | All | |||||
| 453 | FRANCES | Gorran | Any | |||||
| 445 | FRANCIS | Gwennap | pre1800 | |||||
| 453 | FRANCIS | Gorran | Any | |||||
| 303 | FRAYNE | Egloskerry | 1650-1800 | |||||
| 604 | FREATHY | Torpoint / Antony | All | |||||
| 743 | FREEMAN | Truro | c1600s | |||||
| 666 | FREETHY | St. Breock / St. Issey | 18-19C | |||||
| 510 | FURZE | Ruan Lanihorne | 1750+ | |||||