Thomas Aquinas was an Italian Dominican friar and priest, an influential philosopher and theologian, and a jurist in the tradition of scholasticism from the county of Aquino in the Kingdom of Sicily, Italy; he is known within the tradition as the Doctor Angelicus, and the Doctor Communis. In 1999, John Paul II added a new title to these traditional ones: Doctor Humanitatis.
Thomas Arnold was an English educator and historian. He was an early supporter of the Broad Church Anglican movement. As headmaster of Rugby School from 1828 to 1841, he introduced several reforms that were widely copied by other noted public schools. His reforms redefined standards of masculinity and achievement.
T. A. Rickard, formally known as Thomas Arthur Rickard was born on 29 August 1864 in Italy. Rickard's parents were British, and he became a mining engineer practising in the United States, Europe and Australia. He was also a publisher and author on mine engineering subjects.
Thomas Scott Asbridge is a historian at Queen Mary University of London, a position he has held since 1999. He is the author of The First Crusade: A New History (2004), a book which describes the background, events, and consequences of the First Crusade, as well as of The Crusades: The War for the Holy Land (2010), a volume providing a view on the crusading movement, portraying the ideas of justified violence and jihad.
Thomas Patrick Ashe was a member of the Gaelic League, the Gaelic Athletic Association, the Irish Republican Brotherhood (IRB) and a founding member of the Irish Volunteers.
Thomas Blanchard Dewey was an American author of hardboiled crime novels. He created two series of novels: the first one features Mac, a private investigator from Chicago, the second features Pete Schoefield.
Thomas Babington Macaulay, 1st Baron Macaulay, was a British historian and Whig politician, who served as the Secretary at War between 1839 and 1841, and as the Paymaster-General between 1846 and 1848.
Thomas Bailey Aldrich was an American writer, poet, critic, and editor. He is notable for his long editorship of The Atlantic Monthly, during which he published writers including Charles W. Chesnutt. He was also known for his semi-autobiographical book The Story of a Bad Boy, which established the "bad boy's book" subgenre in nineteenth-century American literature, and for his poetry.
Thomas Bartholin was a Danish physician, mathematician, and theologian. He discovered the lymphatic system in humans and advanced the theory of refrigeration anesthesia, being the first to describe it scientifically.
