William Llowyn Longyear (June 17, 1899 - August 1980) was a game artist.
"William L. Longyear was an illustrator, designer, author and professor. Born in Manhasset, New York, he studied at the Art Students League, Columbia University and the Pratt Institute. He worked at the Museum of Science and Industry in New York and as an illustrator at Fortune magazine. He also designed board games and authored several books beginning in the 1930s, most of them textbooks on advertising design and typography; some of his books remained in print into the 1960s. By 1940, Longyear was on the faculty at Pratt Institute in Brooklyn, where he served as Chairman of the Department of Advertising Design and as Associate Dean. Today there is an endowed scholarship for design students at Pratt named in his honor."
--Falk, Peter Hastings, ed. Who Was Who in American Art. Madison, Connecticut: Sound View Press, 1985. p. 378.
NOTE: Though this artist is credited as designer for some games in the BGG database, this may be due to a difference in terminology. In at least one case, William Longyear is credited on a game board as "designer" while someone else is credited as copyright holder; it's likely that "designer" translates to "artist" in BGG speak.