FELICIA: Feminine of "Felix." Relatives: Felice, Felicity, Felisse, Feliciana, Felyce, Phylice, Philicia, Phylicia. Namesake: Phylicia Rashad.
FELIX: Latin for "happiness." four popes chose this name. Relative: Felice. Namesakes: Felix Frankfurter, Felix Rohayton, "Felix the Cat."
FERDINAND: Old German for "courageous traveler." A royal name in the Spanish monarchy. Relatives: Ferdie, Ferdy, Ferde, Ferd, Fernando, Fernandas. Namesakes: King Ferdinand, Ferde Grofé, "Ferdinand the Bull."
FERGUS: Irish Gaelic for "strong man." This name sounds like it came directly from the Highlands. Buy this kid a kilt. Relatives: Ferguson, Fergie, Fergy, Fergun. Namesakes: Ferguson Jenkins, Sarah Ferguson (Princess "Fergie"), James Fergus.
FERN: Old English for "leafy plant." According to ancient lore, fern seeds were thought to make one invisible. Relatives: Ferne, Fearn, Fearne, Fernly.
FERRIS: Latin for "iron." Relatives: Ferrys, Ferrell, Ferrel. Namesake: "Ferris Bueller," Ferris Wheel.
FIELDING: Old English for "field." Strong and solid. Relatives: Field, Fielder. Namesakes: Fielder Jones, Henry Fielding.
FINNIAN: Irish for "fair-haired." Another choice from the Emerald Isle. Relatives: Finn, Finnie, Finny, Finian, Finley, Fyn, Fynn. Namesake: Finian's Rainbow.
FIONA: Old English for "white." Perfectly beautiful. This name has always been popular in the British Isles. Relatives: Fione, Fionn. Namesake: Fiona St. Aubyn.
FITZ: From the Latin for "son." Fitz names were commonly given to the illegitimate sons of royalty. Relatives: Fitzgerald, Fitzroy, Fitzhugh, Fitzpatrick. Namesakes: John Fitzgerald Kennedy, Barry Fitzgerald.