William Henry Jackson was an American photographer, Civil War veteran, painter, and an explorer famous for his images of the American West. He was a great-great nephew of Samuel Wilson, the progenitor of America's national symbol Uncle Sam. He was the great-grandfather of cartoonist Bill Griffith, creator of Zippy the Pinhead comics.

William Henry Jackson Griffith is an American cartoonist who signs his work Bill Griffith and Griffy. He is best known for his surreal daily comic strip Zippy. The catchphrase "Are we having fun yet?" is credited to Griffith.