Frederick I was a historical figure and the Holy Roman Emperor during the 12th century. He was also known by other names and titles such as Frederick Barbarossa, which means "red beard" in Italian, and King of the Germans. In addition, he was referred to as Duke of Swabia before his coronation. The name "Barbarossa" stuck with him even until today, and has been widely used to refer to him. These different names associated with Frederick I reflect his various roles, titles, and achievements which contributed to his prominence in history.