I of Spain, the eldest son of Philip V of Spain by his first Queen consort Maria Louisa of Savoy Princes of Monaco Louis I, Prince of Monaco Louis II, Prince of Monaco, Sovereign Prince of Monaco from 26 June 1922 until 9 May 1949 Princes of the United Kingdom Prince Louis of Wales (born 2018), son of William, Prince of Wales, and Catherine, Princess of Wales, grandson of King Charles III Dukes and Kings of Bavaria Louis I, Duke of Bavaria Louis II, Duke of Bavaria Louis III, Duke of Bavaria Louis IV, Holy Roman Emperor, also Duke of Bavaria Louis V, Duke of Bavaria, also Margrave of Brandenburg as Louis I Louis VI, Duke of Bavaria, also Margrave of Brandenburg as Louis II Louis VII, Duke of Bavaria Louis VIII, Duke of Bavaria Louis IX, Duke of Bavaria Louis X, Duke of Bavaria Louis I King of Bavaria from 1825 to 1848 Louis II King of Bavaria from 1864 to 1886, the Märchenkönig (Fairy tale king) Louis III, Regent from 1912 to 1913, King from 1913 to 1918 (last king of Bavaria) Grand-Duke of Berg Louis, Grand Duke of Berg from 1809 to 1813, also King of Holland as Louis II Grand-Dukes of Hesse Louis I, Grand Duke of Hesse Louis II, Grand Duke of Hesse Louis III, Grand Duke of Hesse Louis IV, Grand Duke of Hesse Duke of Savoy Louis, Duke of Savoy, Duke of Savoy from 1440 to 1465 Duke of Württemberg Louis Eugene, Duke of Württemberg Landgrave of Hesse-Darmstadt Louis IX, Landgrave of Hesse-Darmstadt Science and innovation Louis Blériot (1872–1936), French aviator and inventor Louis Braille (1809–1852), inventor of braille Louis de Broglie (1892–1987), French physicist and Nobel Prize laureate Louis Ignarro (1941) American pharmacologist and Nobel Prize laureate Louis Leakey (1903–1972), British paleontologist Louis Lliboutry, French-Chilean glaciologist Louis Mink (1921–1983), American philosopher of history Louis Pasteur (1822–1895), French microbiologist and chemist, discoverer of the principles of vaccination, microbial fermentation and pasteurization Louis Schoonhoven (born 1931), Dutch entomologist Louis Slotin (1910–1946), Canadian physicist and chemist Louis Wirth (1897–1952), American sociologist Sports Louis Almond (born 1992), English footballer Louis Babrow (1915–2004), South African rugby union player Louis Baise (born 1927), South African Olympic wrestler Lou Boudreau (1917–2001), American, Hall of Fame baseball player and manager Lou Brock (born 1939), American baseball player Louis Bullard (1956–2010), American football player Louis Campbell (born 1979), American basketball player