GIDEON: From the Hebrew for "mighty warrior." According to the Old Testament, Gideon tricked his enemy into thinking he led a massive army by breaking crockery and sounding the trumpets. Relatives: Giddy, Gid. Namesakes: Gideon Putnam, Gideon Bible.
GIFFORD: Middle English for "a worthy gift." Relative: Giff. Namesake: Frank Gifford.
GIG: Middle English for "horse-drawn carriage" and vaudevillian for "one-night stand." Namesake: Gig Young.
GILBERT: Old German for "bright desire." Gilberta is a feminine version. Relatives: Gilberto, Guilbert, Giggon, Gil, Gilly, Gip, Gipper, Gib, Gibby, Gibbs, Gibson, Gillett, Gillette, Wilbert, Wilbur, Bert. Namesakes: Gilbert Roland, John Gilbert, W.S. Gilbert, Astrid Gilberto.
GILDA: Celtic for "servant of God" and Old English for "gold-coated." A variation on Golda. Relative: Gylda. Namesakes: Gilda Radner, Rigoletto's daughter.
GILES: From the Greek for "shield of hides" and French for "youth." Sounds like the name of a British butler. Saint Giles is the patron saint of the physically handicapped. Relatives: Gyles, Gilles, Gilean, Gileon, Gil, Gillette, Gillian, Egedio, Egide, Egidius. Namesake: "Giles Goat Boy."
GILFORD: Old English for "a ford near the wooded ravine." Relatives: Guilford, Gilmore, Gilroy. Namesake: Jack Gilford.
GILLA: Hebrew for "my joy is in the Lord." Relatives: Giliah, Gilana, Gila, Gilah.
GILLIAN: A variation of Juliana, popularized in Britain during the Middle Ages. May be pronounced with either a hard "g" (as in"glue") or a soft "g" (as in "gem"). Relatives: Gillianne, Gilliana, Gilly, Gill.