| Feidhlim | An Irish name meaning ever good. |
| Feidhlimidh | Variant of Feidhlim: Good forever. |
| Felan | A name meaning little wolf. |
| Felim | Variant of Feidhlim: Good forever. |
| Ferrel | Variant of Farrell: Brave man. |
| Ferrell | A man of great, heroic valor. |
| Ferrill | Variant of Farrell: Brave man. |
| Ferryl | Variant of Farrell: Brave man. |
| Ffionn | foxglove flower |
| Fianait | An Irish name meaning little deer. |
| FIannan | A name meaning a little warrior. |
| Fidelma | A name meaning true beauty. |
| Findley | Variant of Finlay: Fair hero. |
| Fineen | A name meaning fair or white skin. |
| Fineena | Beautiful child |
| Finegan | Variant of Finnegan: Fair. |
| Finella | White shouldered |
| Finghin | One who is fair or white of birth. |
| Finin | Variant of Fineen: Fair birth; handsome. |
| Finlay | A name meaning fairhaired hero. |
| Finleigh | Variant of Finlay: Fair hero. |
| Finna | A name meaning the fair woman. |
| Finneen | Beautiful child |
| Finnegan | fair. Finians were warrior-followers of 3rd century legendary Irish hero Finn Mac Cumhail. |
| Finnian | White or Fair: St. Finnian was the patron saint of monastacism. |
| Finnin | A name meaning the fairhaired. |
| Finola | It means white shoulder or fair shoulder. |
| Fionan | It means little fair one or little sun. |
| Fionn | This name means fair, white, or bright. |
| Fionna | It means fair, white, or beautiful one. |
| Fionnbarr | This name means fair hair or fair head. |
| Fionnbharr | Variant of Finbar: Blond-haired; handsome. |
| Fionnghuala | White shouldered |
| Fionnuala | It means fair shoulder or white lady. |
| FIynn | A name meaning fair or white. |
| Flaine | Variant of Flannery: Red-haired. |
| Flainn | A name meaning bright red or ruddy. |
| Flanagan | A name meaning the redhaired one. |
| Flann | A name meaning a bright red color. |
| Flanna | A name meaning a redhaired woman. |