Diedrich Knickerbocker is an American literary character who originated from Washington Irving's first novel, A History of New-York from the Beginning of the World to the End of the Dutch Dynasty, by Diedrich Knickerbocker (1809). He is a Dutch-American historian who is dressed in a specific type of baggy-kneed trousers referred to as knickerbockers, later shortened to knickers. The word knickerbocker is also used to refer to people who live in Manhattan, and was adopted in a shortened form as the Knicks by the city's NBA professional basketball team.

Washington Irving was an American short-story writer, essayist, biographer, historian, and diplomat of the early 19th century. He wrote the short stories "Rip Van Winkle" (1819) and "The Legend of Sleepy Hollow" (1820), both of which appear in his collection The Sketch Book of Geoffrey Crayon, Gent. His historical works include biographies of Oliver Goldsmith, Muhammad, and George Washington, as well as several histories of 15th-century Spain that deal with subjects such as the Alhambra, Christopher Columbus, and the Moors. Irving served as American ambassador to Spain in the 1840s.