Jack Thayer (1894–1945), his son, survivor of the Titanic sinking
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John A. Thayer (1857–1917), former member of the United States House of Representatives from Massachusetts
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John R. Thayer (1845–1916), former member of the United States House of Representatives from Massachusetts
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John Milton Thayer (1820–1906), former United States Senator from Nebraska and Civil War general
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John Theyer (1597–1673), English royalist lawyer and writer, antiquary and bibliophile
John F. Kennedy | Pope John Paul II | Elton John | John | John Lennon | John Wayne | John McCain | John Kerry | John Cage | Olivia Newton-John | John Williams | John Peel | John Adams | John Steinbeck | John Travolta | John Milton | John Zorn | John Marshall | John Howard | John Singer Sargent | John Ruskin | John Updike | John Maynard Keynes | John Coltrane | John Cleese | St. John's | John Waters | John Lee Hooker | John Huston | John Ford |
V. I. Warshawski, a private detective, is employed by a man who calls himself John Thayer to find his son's girlfriend, Anita Hill.