| Fercetrniu |
Fercartna - Ferchertne |
| Ferdia |
Ferdiad - Fer Diad |
| Fergus Mac Leda |
Fergus Mac Leide - Fergus Mac Leite |
| Feryllt |
Fferyllt |
| Fiachra |
Fiachna |
| Fianna of Erin |
Fenians Finn |
| Fionn Finn Mac Cumhal |
Fionn Mac Cumhal - Finn Mac Cool |
| Fir Dhearga |
Fir Darrig |
| Fohla |
Fodla |
| Gae Bulga |
Gae Bolg
|
| Geasa |
Geis - Geas - Gease - Ges |
| Genii Cucullati |
Genius Cucullatus |
| Gentle Annis |
Gentle Annie |
| Gilfaethwy |
Gilvaethwy |
| Glewlwyd |
Gafaelfawr |
| Gog and Magog |
Gogmagog |
| Grainne |
Grania |
| Guendolena |
Guendoloena - Gwendolena |
| Guinevere |
Gwenhwyfar - Gwnhwyvar |
| Gwair |
Gweir - Gwrhyd - Ennwir |
| Gwenfrewi |
Winefride |
| Gwydion |
Gwydyon |
| Hadrian |
Adrian |
| Hector |
Ector |
| Hilda, Saint |
Hildeburh |
| Hreda |
Hretha |
| Hounds of Ulster |
Hounds of Ulaid |
| Igraine |
Igerne |
| Iseult |
Isolde |
| Kian |
Cian |
| Kilhwch |
Culhwch |
| Kymideu |
Kymeinvoll |
