Louis I of France "the Pious" (778–840), king of France and Holy Roman Emperor.

Louis I of Hungary/Poland (1326–1382).

Luís I of Portugal (1838–1889).

Ludwig I of Bavaria (1786–1868).

Louis of Spain (1707–1724).

Louis of Valois, Duke of Orléans (1372–1407).

Louis I of Naples (1339–1384).

Louis I, Duke of Bourbon (1279–1342).

Louis I de Bourbon, Prince de Condé (1530–1569).

Louis I Wittelsbach, Duke of Bavaria (1173–1231).

Louis I, Cardinal of Guise (1527–1578).

Louis I, Count of Montpensier (1405–1486).

Louis I of Blois (1172–1205).

Ludwig I of Thuringia (ruled 1123–1140).

Louis I of Flanders (1304–1346).

Louis I of Châtillon (died 1346).