| Surname | Country | State | County or Province | From | To | Member |
|---|---|---|---|---|---|---|
| Fabre | France | Provence-Alpes-Côte-d'Azur | Alpes de Haute Provence | 1675 | 1720 | J009-1 |
| Fahey | Ireland | County Abbeyleix | 1860 | present | D015-1 | |
| Faraud | France | Provence-Alpes-Côte-d'Azur | Alpes-Maritimes | 1570 | 1700 | J009-1 |
| Farrell | Ireland | 1832 | 1848 | K027-1 | ||
| Farrell | USA | Wisconsin | 1880 | 1920 | S034-1 | |
| Farrell | USA | Pennsylvania | 1848 | 1908 | K027-1 | |
| Faught | USA | Virginia | 1700s | A001-1 | ||
| Faught | USA | Ohio | 1700s | A001-1 | ||
| Faught | USA | Illinois | 1700s | A001-1 | ||
| Fay | USA | Wisconsin | Manitowoc County | B016-1 | ||
| Feerick | Ireland | Coutny Galway | Headford | 1800 | 1850 | O006-1 |
| Feerick | Ireland | County Galway | Tuam | 1800 | 1850 | O006-1 |
| Feitler | Czech Republic | Bohemia | Moravia | 1700 | present | F010-1 |
| Feller | Luxembourg | Petange (Town) | bef 1882 | W010-1 | ||
| Fenton | USA | Tennessee | S034-2 | |||
| Fenton | USA | Kentucky | S034-2 | |||
| Fiançon/Fianson/Fianzon/Fianssone | France | Provence-Alpes-Côte-d'Azur | Alpes-Maritimes | 1550 | 1940 | J009-1 |
| Fiebiger | Germany | H007-1 | ||||
| Fifer | D002-1 | |||||
| Finardi | Italy | Trentino | Alto Adige | 1700 | 1810 | J009-1 |
| Finch | USA | Maryland | Calvert County | 1687 | 1729 | T007-1 |
| Fischer | Prussia | E005-1 | ||||
| Fischer | Germany | Hann-Munden | Hannover | 1800 | 1859 | M011-1 |
| Fischer | Denmark | Copenhagen | 1859 | T007-1 | ||
| Fischer | USA | Illinois | E005-1 | |||
| Fischer | USA | Illinois | St. Clair County | 1859 | present | M011-1 |
| Fisk | Sweden | Varmland | Örebro | Bef 1901 | B019-1 | |
| Fiske | USA | Illinois | Cook County | 1901 | 1970 | B019-1 |
| Fiske | B019-1 | |||||
| Fitsimmons/Fitzsimmons | USA | Pennsylvania | Shade Gap, Huntingdon County | 1826 | 1904 | D011-1 |
| Fitzgerald | Ireland | County Limerick | Limerick City | 1793 | ? | B026-2 |
| Flanigan | USA | Wisconsin | 1880 | 1920 | S034-1 | |
| Fleming | E005-1 | |||||
| Flizikowski | Poland | 1865 | 1892 | K026-1 | ||
| Flizikowski | Germany | 1850 | Present | K026-1 | ||
| Flizikowski | Prussia | 1865 | 1892 | K026-1 | ||
| Flizikowski | USA | IL | Cook | 1892 | 1934 | K026-1 |
| Floyd | USA | Virginia | Culpeper | 1763 | 1820 | F009-1 |
| Floyd | USA | New York | Suffolk | 1790 | 1930 | F014-1 |
| Floyd | USA | Kentucky | Boone | 1820 | 1823 | F009-1 |
| Floyd | USA | Ohio | Preble | 1823 | present | F009-1 |
| Flynn | Northern Ireland | S034-2 | ||||
| Flynn | USA | Missouri | S034-2 | |||
| Foley | Ireland | L008-1 | ||||
| Foley | USA | Illinois | L008-1 | |||
| Foll/Voll | A010-1 | |||||
| Forestier | USA | Texas | S016-1 | |||
| Forrest | USA | Ohio | A007-1 | |||
| Forster | Germany | F006-1 | ||||
| Forster | USA | Illinois | F006-1 | |||
| Foster | USA | Ohio | Tuscarawas County | 1810 | present | N001-1 |
| Fourtany | Italy | Piemonte | Pasturana | 1700 | 1755 | J009-1 |
| Fox | USA | Tennessee | Robertson County | 1800 | 1940 | C022-1 |
| Foy | W008-1 | |||||
| Frantz | USA | Pennsylvania | Lancaster County | 1727 | 1825 | F008-1 |
| Frey | USA | Pennsylvania | Monroe County | P013-1 | ||
| Frick | Germany | O004-1 | ||||
| Friedman | Ukraine | Kremenets | K010-1 | |||
| Frost | Romania | Bucharest | K010-1 | |||
| Frost | USA | Maine | 1631 | 1725 | P012-1 | |
| Fry | USA | Missouri | Marion County | P013-1 | ||
| Frye | USA | P013-1 | ||||
| Fugate | USA | Virginia | Russell County | 1759 | 1900 | K021-1 |