Louis \louis\ as a boy's name is pronounced LOO-iss, loo-WEE. It is of French and Old German origin, and the meaning of Louis is "famous warrior". A name used by 18 French kings and numerous saints. The German form is Ludwig; a Latin version is Clovis, which was borne by a German tribal leader who ended the Roman domination of what is now France and made himself king. Musician Louis Armstrong; scientist Louis Pasteur; authors Louis L'Amour; Robert Louis Stevenson; actor Lou Gossett, Jr.