| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| FÁElÁN | - | Ancient Irish | ||
| FÍOna | - | Irish | ||
| Fachtna | FAKHT-na | Irish, Irish Mythology | ||
| FaolÁN | FWAY-lahn | Irish | ||
| Farquhar | - | Irish, Scottish | ||
| Fearchar | - | Irish, Scottish | ||
| Feardorcha | - | Irish | ||
| Fearghal | - | Irish | ||
| Fearghas | - | Irish, Scottish, Irish Mythology | ||
| FechÍN | FE-kheen | Irish | ||
| Fedelm | - | Irish Mythology | ||
| Fedelma | - | Irish | ||
| Fedelmid | - | Ancient Irish, Irish Mythology | ||
| Fedlimid | - | Ancient Irish, Irish Mythology | ||
| FeichÍN | - | Irish |