Why is a unbranded calf called a maverick?

A maverick is an unbranded calf because the term originates from Samuel Maverick, a Texas rancher in the 19th century who notably did not brand his cattle. As a result, any unbranded calf found roaming was referred to as a "maverick," distinguishing it from those owned by other ranchers. The term has since evolved to represent someone who is independent-minded or nonconformist.