Harpo Marx for the name Adolph (as a child, he was routinely called "Ahdie" instead). The name change may have also happened because of the similarity between Harpo's name and Adolph Marks, a prominent show business attorney in Chicago. Urban legends stating that the name change came about during World War I due to anti-German sentiment in the US, or during World War II because of the stigma that Adolf Hitler imposed on the name, are groundless. His first screen appearance was in the film "Humor Risk" (1921), with his brothers, although according to Groucho, it was only screened once and then
Adolph I, Duke of Cleves Adolph I, Duke of Cleves Adolph I of Cleves () (2 August 1373 – 23 September 1448) was the second Count of Cleves and the fourth Count of Mark. He was the son of Adolph III, Count of Mark, and Margaret of Jülich (and thus the brother of Margaret of Cleves). After his father's death in 1394, he became Count of Cleves. In 1397 he defeated his uncle William VII of Jülich, 1st Duke of Berg in the battle of Kleverhamm and became Lord of Ravenstein. When his brother Dietrich IX, Count of Mark died in battle in 1398, he