William Worrall Mayo ( ; May 31, 1819 – March 6, 1911) was a British-American medical doctor and chemist.
 He is best known for establishing the private medical practice that later evolved into the Mayo Clinic.
 He was a descendant of a famous English chemist, John Mayow.
 His sons, William James Mayo and Charles Horace Mayo, established a joint medical practice in Rochester in the U.S. state of Minnesota in the 1880s.
Henry Stanley Plummer, M.D. ((1874--) 03, 1874 – (1936--) 31, 1936 ) was a prominent internist and endocrinologist who, along with Drs. William Mayo, Charles Mayo, Stinchfield, E. Starr Judd, Christopher Graham, and Donald Balfour founded Mayo Clinic.
 Dr. Plummer is also immortalized as the driving force behind the Plummer Building, which still stands as a part of the Clinic he helped establish.
Mayo High School (Mayo) is an American high school in Rochester, Minnesota.
 It is named after the brothers William James Mayo and Charles Horace Mayo, physicians and founders of the Mayo Clinic.
 It is a public school and part of the Rochester Independent School District #535.
 The current principal of Mayo High School is Tom Olson.
Augustus W. Stinchfield (December 21, 1842 – 1917) was an American physician and one of the co-founders—along with Drs. Charles Horace Mayo, William James Mayo, Christopher Graham, E. Starr Judd, Henry Stanley Plummer, Melvin Millet and Donald Balfour—of the Mayo Clinic in Rochester, Minnesota.
William James Mayo (June 29, 1861 – July 28, 1939) was a physician and surgeon in the United States and one of the seven founders of the Mayo Clinic.
 He and his brother, Charles Horace Mayo, both joined their father's private medical practice in Rochester, Minnesota, USA, after graduating from medical school in the 1880s.
 In 1919, that practice became the not-for-profit Mayo Clinic.
Charles William Mayo (July 28, 1898 – July 28, 1968) was an American surgeon, and a member of the board of governors of the Mayo Clinic beginning in 1933.
 He was the son of Mayo Clinic co-founder Charles Horace Mayo and Edith (Graham) Mayo.
Charles Horace Mayo (July 19, 1865 – May 26, 1939) was an American medical practitioner and was one of the founders of the Mayo Clinic along with his brother, William James Mayo, Augustus Stinchfield, Christopher Graham, E. Star Judd, Henry Stanley Plummer, Melvin Millet, and Donald Balfour.
Charles Horace Watkins (1884–1976) was an aviation pioneer who built the first engine-powered aeroplane in Wales, a red monoplane called the "Robin Goch".
Antoine Charles Horace Vernet aka.
 Carle Vernet (14 August 175817 November 1836) was a French painter, the youngest child of Claude Joseph Vernet, and the father of Horace Vernet.
Stephen Philbrick is an American author, poet, and licensed United Church of Christ minister.
 He is the son of poet Charles Horace Philbrick, the father of author Frank Philbrick, the brother of master furniture maker Timothy Philbrick, the cousin of author Nathaniel Philbrick, and the uncle of artist Clancy Philbrick.
 He is a linchpin of the Philbrick literary family.
 Philbrick graduated from Brown University in 1971, and now lives in Windsor, Massachusetts.
 Philbrick is the minister of the West Cummington Congregational Church, which burned to the ground in 2010.
 The church was rebuilt in the following two years and reopened on November 4, 2012.
 The occasion of the reopening was marked by a celebration of the congregation and a service by Philbrick.

Question: Who died first, Charles Horace Mayo or Augustus Stinchfield?
Answer: Augustus W. Stinchfield