Luna

Luna late 14c. "moon," also an alchemical name for "silver;" from L. luna "moon, goddess of the moon," from *leuksna- (Cf. O.C.S. luna "moon," O.Pruss. lauxnos "stars," M.Ir. luan "light, moon"), from the same source as lux, lumen "light," lucere "to shine" (see LIGHT (Cf. light) (n.)). The luna moth (1841, Amer.Eng.) so called for the crescent-shaped markings on its wings. Lunarian (1708) was an early word for "inhabitant of the moon."