1560s, "an inhabitant of ancient Gaul," from French Gaule, from Latin Gallia, from Gallus "a Gaul." Also used somewhat facetiously for "a Frenchman." Gauloise, the popular brand of French cigarettes, dates to 1910.
gaudery
gaudily
gaudiness
gaudy
gauge
Gaul
Gaulish
gaunt
gauntlet
gauss
Gautama