| louis i | (n) third son of Charlemagne and king of France and Germany and Holy Roman Emperor (778-840), Syn. Louis the Pious |
| louis ii | (n) king of France and Germany (846-879), Syn. Louis the Stammerer, Louis le Begue, Louis the German |
| louis iii | (n) son of Louis II and king of the France and Germany (863-882) |
| louis iv | (n) king of France (921-954), Syn. Louis d'Outremer |
| louis ix | (n) king of France and son of Louis VIII; he led two unsuccessful Crusades; considered an ideal medieval king (1214-1270), Syn. Saint Louis, St. Louis |