jaunty (adj.)

also janty, jantee, etc., 1660s, "elegant, stylish," an imperfect or jocular attempt to render into English the contemporary pronunciation of French gentil "nice, pleasing," in Old French "noble" (see gentle). Meaning "easy and sprightly in manner" first attested 1670s. The same French word otherwise was Englished as genteel. Related: Jauntily; jauntiness.