William Roger Van Horn (born February 15, 1939) is an American cartoonist. Van Horn debuted professionally in his forties with the black-and-white comic book Nervous Rex (1985-1987). A huge fan of Carl Barks, from 1988 Van Horn became a Disney comics artist and writer, producing for decades Donald Duck and Uncle Scrooge stories (occasionally with scripts by John Lusting), primarily for the northern European market. His son Noel Van Horn has worked extensively as a Disney cartoonist as well.

Pat McGreal was a prolific writer of Disney Comics for the Egmont Company overseas, much of it later republished in this country. His non-Disney work included three graphic novels for DC/Vertigo: Chiaroscro; The Private Lives of Leonardo DaVinci, Veils and I, Paparazzi. Among the comic books he wrote for were Captain Marvel, Tarzan, The Simpsons, Judge Dredd, The Flash, Justice League, Indiana Jones, Martian Manhunter and Fighting American. He was an Eisner Award nominee and a past president of the Comic Art Professonal Society.