general – Marshall Plan. John Marshall, British explorer – Marshall Islands Maurice Martenot, French inventor – Ondes Martenot Henry Martin, American businessman – Martinizing Dry Cleaning Lionel Martin, British businessman – Aston Martin Glenn Luther Martin, American businessman – Glenn L. Martin Company (later Lockheed Martin). Jean Martinet, French militarian – martinet (a disciplinarian). Alessandro Martini, Italian businessman – Martini (cocktail), Martini (vermouth). Groucho Marx, American comedian and film actor – Groucho glasses, Grouchoesque. Karl Marx, German philosopher and economist – Marxism. Mary, mother of Jesus – numerous communities and geographic features (either named St. Mary or having the word Lady in them) like the Marists, a large number of cathedrals, churches, and religious orders, the ladybird Mary the Jewess, ancient alchemist – Bain-marie to warm substances such as Elixir to germinate precious metals. Alfieri Maserati, Italian businessman – Maserati. Abraham Maslow, American psychologist – Maslow's hammer, Maslow's hierarchy of needs, Maslow-Toffler School of Futuristic Education, and Maslowian portfolio theory. Charles Mason and Jeremiah Dixon, British astronomers – Mason–Dixon Line. John L. Mason, American inventor – Mason jar. Alonzo C. Mather, American businessman – Mather Stock Car Company. Matilda Joslyn Gage, suffragist and abolitionist — Matilda effect. Matthew the Apostle, Biblical prophet – Matthew effect. Harold Matson and Elliot Handler, American businessmen – Mattel. Jujiro Matsuda, Japanese businessman – Mazda (also possibly inspired by Zoroastrian god Ahura Mazda) Queen Maud of Norway, Norwegian queen – Queen Maud Gulf (Canada), Queen Maud Land in Antarctica, Queen Maud fromage. Maurice of Nassau, Dutch politician – Mauritius Paul Mauser and Wilhelm Mauser, German businessmen – Mauser gun Maussollus, Carian king – mausoleum. Max und Moritz, German comics/literary characters – Max & Moritz Prize Hiram Maxim, American gun inventor – Maxim gun James Clerk Maxwell, British physicist – maxwell, Maxwell equations, Maxwell's spot (a bright magenta colored spot at the center of vision, when looking at a deep purple or violet background or through a violet color filter) Louis B. Mayer, American film producer – Louis B. Mayer Pictures which later merged into Metro–Goldwyn–Mayer (or MGM). Walther Mayer and Leopold Vietoris, Austrian mathematicians – Mayer–Vietoris axiom, Mayer–Vietoris theorem. Thabo Mbeki, South-African president – Mbekite. John Loudon McAdam, Scottish engineer – macadam process of road construction, tarmac (tar+macadam) road surface Charles McBurney, American surgeon – McBurney's point (aka McBurney's sign), a sign of acute appendicitis. Joseph McCarthy, American politician – McCarthyism. Richard and Maurice McDonald,