What was Byron called since he turned age thirteen?

Since he turned thirteen, Byron was often referred to as "Byron the Bully" by his peers in the novel "The Watsons Go to Birmingham – 1963" by Christopher Paul Curtis. This nickname reflects his tough demeanor and tendency to assert his dominance over others, particularly his younger brother, Kenny. However, as the story progresses, his character experiences growth and development, revealing deeper layers beyond his initial reputation.