Mayo, Charles Horace, 1865-1939, American surgeon, b. Rochester, Minn., M.D. Northwestern Univ., 1888. He specialized in goiter and cataract operations. His brother, William James Mayo, 1861-1939, b. Le Sueur, Minn., M.D. Univ. of Michigan, 1883, was also a surgeon; he specialized in abdominal surgery. From a small clinic opened by their father, William Worrall Mayo, in Rochester, Minn., in 1889, the brothers developed the world-renowned Mayo Clinic. Named in 1905, it became a medical center in 1915. Today it is a private nonprofit group practice with a staff of more than 1,000 physicians and scientists that, in addition to its Rochester facilities, also maintains clinics in Jacksonville, Fla., and Phoenix and Scottsdale, Ariz. In 1915 the Mayos also established the first graduate program in clinical medicine (affiliated with the Univ. of Minnesota until 1983); it is one of several medical and health science schools that are part of the clinic.

Mayo, Henry Thomas, 1856-1937, American naval officer, b. Burlington, Vt. In 1913 he became commander of the Atlantic Fleet. At Tampico in 1914 he precipitated an international incident by demanding an apology and salute to the American flag after Mexican officials had arrested U.S. sailors. President Wilson supported Mayo's demands, and he was made (1915) vice admiral. He was commander of the Atlantic Fleet in World War I and for a time in 1919 commanded the entire U.S. fleet. He was given the permanent rank of rear admiral and in 1920 was retired.

Mayo, county (1991 pop. 110,696), 2,084 sq mi (5,398 sq km), W Republic of Ireland. The county seat is Castlebar. The western portion, including large Achill island, is mountainous; the eastern part is more level. There are numerous lakes (Mask, Carrowmore, Cullen, Conn, and Carra), and the irregular coast line is deeply indented by bays (Killala, Broadhaven, Blacksod, and Clew). Oats and potatoes are grown; cattle, sheep, pigs, and poultry are raised. Bacon curing, woolens manufacturing, and flour milling are carried on. Tourism is developing. The region was granted to the De Burghs after the Anglo-Norman invasion of Ireland, but the county was not brought fully under English control until the late 16th cent.

Mayo can refer to:

• Mayo Clinic, a medical center in Rochester, Minnesota, United States
• Mayo Medical School, a American medical school that is part of the Mayo Clinic and the Mayo College of Medicine
• Mayo High School, a public high school in Rochester, Minnesota, United States
• Mayo College, a secondary educational institution in Ajmer, Rajasthan, India
• Mayo GAA, an inter-county Gaelic Athletic Association team
• Mayo people, an Indigenous ethnic group who live in the Mexican states of Sinaloa and Sonora
• Mayo language, spoken by the Mayo people
• Mayo (TV series), a BBC television series first broadcast in 2006
• Mayo Hospital, in Lahore, Pakistan
• The Mexican American Youth Organization
• Project Mayo, an open source project by DivX, Inc.
• Mayonnaise, sometimes abbreviated as mayo

Places

Ireland

• County Mayo
• Mayo (Dáil Éireann constituency)
• Mayo (UK Parliament constituency)
• Mayo (Parliament of Ireland constituency)
• Mayo East (Dáil Éireann constituency)
• Mayo North (Dáil Éireann constituency)
• Mayo North and West (Dáil Éireann constituency)
• Mayo South (Dáil Éireann constituency)
• Mayo West (Dáil Éireann constituency)
• East Mayo (UK Parliament constituency)
• North Mayo (UK Parliament constituency)
• South Mayo (UK Parliament constituency)
• West Mayo (UK Parliament constituency)
• Mayo, County Mayo, a village Australia
• Division of Mayo, an Australian Electoral Division in South Australia Canada
• Mayo, Quebec
• Mayo, Yukon United States
• Mayo, Florida
• Mayo, Maryland Numerous places
• Mayo River, a number of rivers called "Mayo"

People

• Arthur Mayo (1840–1920), recipient of the Victoria Cross
• Barry Mayo, radio executive
• Charles Herbert Mayo (1845–1929), antiquarian
• Charles Horace Mayo (1865–1939), physician and co-founder of the Mayo Clinic
• Elton Mayo (1880–1949), psychologist and sociologist
• Gilmar Mayo (born 1969), Colombian high jumper
• Helen Mayo (1878–1967), women's health pioneer
• Iban Mayo (born 1977), professional bicycle racer
• Jerod Mayo (born 1986), American football player for the New England Patriots
• Manolito Tolentino Mayo (1955–1983), Philippine artist
• O. J. Mayo (born 1987), American basketball player
• Simon Mayo (born 1958), disc jockey
• Virginia Mayo (1920–2005), American film actress
• Whitman Mayo (1930–2001), American television actor

• William Mayo (civil engineer) (c. 1685–1744), the civil engineer who laid out the city of Richmond, Virginia
• William B. Mayo, (1860–1944), chief power engineer of Ford Motor Company
• William James Mayo (1861–1939), co-founder of the Mayo Clinic
• William Worrall Mayo, co-founder of the Mayo Clinic
• Thomas Mayo Brewer (1814–1880), American naturalist
• Richmond Mayo-Smith (1854–1901), American economist

Fictional characters

• Mayo Kagura, the protagonist of the light novel My-HiME Destiny
• Mayo Sakaki, a character of the series Fushigi Yuugi