masc. proper name, Italian, from Old High German Hlothari, Hludher (whence German Luther, French Lothaire; the Old English equivalent was Hloðhere), literally "famous warrior," from Old High German lut (see loud) + heri "host, army" (see harry (v.)). As a characteristic name for a jaunty rake, 1756, from "the gay Lothario," name of the principal male character in Nicholas Rowe's "The Fair Penitent" (1703).