
The first is that the name derived from Julius’ not-so-friendly demeanor. As to why this nickname was picked, there are two popular explanations and one that for a long time was put forth by Groucho, which few believe. Next to be dealt a card was Julius, “and here’s a card for Groucho”. Although, Chico rarely corrected people when they pronounced it wrong, even show hosts who’d interview him. This typo gave rise to the misconception that his name should be pronounced as “cheek-o”, when in fact the correct pronunciation is actually “Chick-o”. Supposedly, a typesetter accidentally left the “k” in “Chico” out in one town the brothers were performing in, and his name became “Chico” instead. You might be wondering at this point, why it was later “Chico” instead of “Chicko”.

(Later, as now, the slang term became “chicks”, which had actually previously referred to children since the 17th century.) As Groucho later said, Chico got the nickname as he was a “Chicken chaser”. “Here’s one for ‘Chicko’.” Leonard Marx was a notorious ladies’ man and, in those days, women and girls were often referred to as “chickens”.
