List of Famous people named William

William of Conches was a French scholastic philosopher who sought to expand the bounds of Christian humanism by studying secular works of the classics and fostering empirical science. He was a prominent member of the School of Chartres. John of Salisbury, a bishop of Chartres and former student of William's, refers to William as the most talented grammarian after Bernard of Chartres.

William Short (1759–1849) was an American diplomat during the early years of the United States. He served as Thomas Jefferson's private secretary when the latter was a peace commissioner in France, and remained in Europe to take on several other diplomatic posts. Jefferson, later the third President of the United States, was a lifelong mentor and friend. In a 1789 letter, Jefferson referred to Short as his "adoptive son."

William Lewis was an English football referee, director, secretary and manager, active in the early 20th century. He managed Brentford and Chelsea, the latter in the Football League.

William de Longchamp was a medieval Lord Chancellor, Chief Justiciar, and Bishop of Ely in England. Born to a humble family in Normandy, he owed his advancement to royal favour. Although contemporary writers accused Longchamp's father of being the son of a peasant, he held land as a knight. Longchamp first served Henry II's illegitimate son Geoffrey, but quickly transferred to the service of Richard I, Henry's heir. When Richard became king in 1189, Longchamp paid £3,000 for the office of Chancellor, and was soon named to the see, or bishopric, of Ely and appointed legate by the pope.

William Eustis Russell was a lawyer and Democratic Party politician from Massachusetts. He served four terms as mayor of Cambridge, and was the 37th Governor of Massachusetts, serving from 1891 to 1894. He was the state's youngest ever chief executive, and was the first Democrat since the American Civil War to serve more than one term in that office.