Thomas Hughes was an English lawyer, judge, politician and author. He is most famous for his novel Tom Brown's School Days (1857), a semi-autobiographical work set at Rugby School, which Hughes had attended. It had a lesser-known sequel, Tom Brown at Oxford (1861).

Thomas Hunt Morgan was an American evolutionary biologist, geneticist, embryologist, and science author who won the Nobel Prize in Physiology or Medicine in 1933 for discoveries elucidating the role that the chromosome plays in heredity.

Thomas Jefferson was an American statesman, diplomat, lawyer, architect, philosopher, and Founding Father who served as the third president of the United States from 1801 to 1809. Among the Committee of Five charged by the Second Continental Congress with drafting the Declaration of Independence, Jefferson was the document's primary author. Following the American Revolutionary War and prior to becoming president in 1801, Jefferson was the first U.S. secretary of state under George Washington and then the nation's second vice president under John Adams.

Thomas Keightley was an Irish writer known for his works on mythology and folklore, particularly Fairy Mythology (1828), later reprinted as The World Guide to Gnomes, Fairies, Elves, and Other Little People.

Thomas Kyd was an English playwright, the author of The Spanish Tragedy, and one of the most important figures in the development of Elizabethan drama.

Thomas Lodge was an English writer and medical practitioner whose life spanned the Elizabethan and Jacobean periods.

Thomas Raynesford Lounsbury was an American literary historian and critic. He was born in Ovid, New York on January 1, 1838. He graduated from Yale College in 1859 with a B.A. and received a M.A. from Yale University in 1887. He later received honorary degrees from Yale University, Harvard University, Lafayette College, Princeton University, and Aberdeen College. He enlisted in the 126th New York Volunteers in 1862 and served in the Civil War as a first lieutenant.

Thomas Love Peacock was an English novelist, poet, and official of the East India Company. He was a close friend of Percy Bysshe Shelley and they influenced each other's work. Peacock wrote satirical novels, each with the same basic setting: characters at a table discussing and criticising the philosophical opinions of the day.

Thomas Michael Disch was an American science fiction writer and poet. He won the Hugo Award for Best Related Book – previously called "Best Non-Fiction Book" – in 1999, and he had two other Hugo nominations and nine Nebula Award nominations to his credit, plus one win of the John W. Campbell Memorial Award, a Rhysling Award, and two Seiun Awards, among others.

Paul Thomas Mann was a German novelist, short story writer, social critic, philanthropist, essayist, and the 1929 Nobel Prize in Literature laureate. His highly symbolic and ironic epic novels and novellas are noted for their insight into the psychology of the artist and the intellectual. His analysis and critique of the European and German soul used modernized versions of German and Biblical stories, as well as the ideas of Johann Wolfgang von Goethe, Friedrich Nietzsche, and Arthur Schopenhauer.