Robert Knollys (died 1520) was an English soldier and courtier known for his service during the late 15th and early 16th centuries. He gained prominence as a military leader, participating in various campaigns, including those in France during the Hundred Years' War. His contributions to the English military earned him recognition and respect. In addition to his military career, Knollys was involved in the royal court, serving under King Henry VII and later King Henry VIII. He held several important positions, including that of a gentleman usher. His legacy continued through his descendants, who played significant roles in English history.