Louis is the French form of the Latinized name Ludovicus, itself derived from the Old Frankish name Chlodwig. The name originates from the Proto-Germanic elements *hlūdaz ('loud, famous') and *wiganą ('to battle, to fight'), giving it the traditional meaning of 'famous warrior' or 'famous in battle'. In its earliest form, recorded in runic inscriptions as ᚺᛚᛟᛞᛟᚹᛁᚷ, the name was borne by Merovingian kings; historians note that Gregory of Tours transcribed such names with a 'chlodo-' element, reflecting its distinct pronunciation. Etymology and History The name Louis has been borne by 18 kings of France, starting with Louis I (Louis the Pious), son of Charlemagne. The most notable among them are Louis IX (Saint Louis), who led two crusades and was canonized for his piety, and Louis XIV, the 'Sun King,' who brought France to the height of its power, built the Palace of Versailles, and remains the longest-reigning monarch in European history. Other kings bearing the name include rulers of Germany (as Ludwig), Hungary (as Lajos), and various European realms. In medieval France, Louis was only moderately popular outside royal circles. Its frequency declined sharply after the French Revolution, when Louis XVI was guillotined in 1793, making it less common for a time. Spread to the English-Speaking World The Normans brought the name to England, establishing the variant Lewis (from the Anglo-Norman pronunciation). In America, both spellings were used, but Louis gained ground in modern times. Notable bearers include French scientist Louis Pasteur (1822–1895), pioneer of vaccination and pasteurization; French actor Louis de Funès (1914–1983); Scottish author Robert Louis Stevenson (1850–1894), who wrote Treasure Island and Strange Case of Dr Jekyll and Mr Hyde; and American jazz musician Louis Armstrong (1901–1971), who revolutionized jazz with his trumpet and distinctive voice. Related Names Louis has spawned numerous variants and related forms across languages: Variants: Loïc (French), Ludovic (French), Lewis (English), Lowie (Dutch), and many more. Diminutives: Lou (Dutch/French), Louison (French), Louie (English). Feminine forms: Louise, Luise, Louisa. Other languages: Basque (Koldobika), Catalan (Lluís), Croatian (Alojzije), and Slovene (Alojz). Meaning: 'famous warrior' or 'famous in battle' Origin: Germanic/Frankish, via French Type: First name Usage Regions: French, English, Dutch, and many other European languages