Harry Duquesne "Duke" Markell (born Makowsky, August 17, 1923 – June 14, 1984) was a French-born professional baseball player, a right-handed pitcher whose career extended from 1945–1957, almost exclusively in minor league baseball. He appeared in five Major League games for the St. Louis Browns in the closing weeks of the 1951 season. Born in Paris, France, he moved to The Bronx, New York City with his family when he was seven years old. Markell stood 6 feet 1 inch (1.85 m) tall and weighed 209 pounds (95 kg). He was Jewish.