As the name of a French gold coin 17c.-18c., short for Louis d'or, from the French kings of that name (originally Louis XIII) pictured on the coins. Louis-Quatorze (1855) refers to styles reminiscent of the time of King Louis XIV of France (1643-1715).
French colony, from 1812 a U.S. state, named 1682 by French explorer la Salle for Louis XIV of France. The name originally applied to the entire Mississippi basin. Related: Louisianian. The Louisiana Purchase, accomplished in 1803, was so called by 1806.
type of tropical woody vine, 1849, named for French navigator Louis Bougainville (1729-1811).
(1755-1793), queen consort of Louis XVI; as the name for a decorative style of France in that period, by 1887. She likely did not say "let them eat cake" (see cake (n.)). The city of Marietta, Ohio, U.S., founded in 1788, was named for her in honor of Louis XVI's financial support of the American Revolution.