He gave the rule of Naples to his illegitimate son Ferdinand I of Naples , who ruled from 1458 to 1494 , and Aragon and Sicily to Alfonso 's brother John II of Aragon .
Eventually , Alfonso of Aragon divided the two kingdoms during his rule .
Alfonso of Aragon gave the rule of Naples to Alfonso of Aragon 's illegitimate son Ferdinand I of Naples , who ruled from 1458 to 1494 , and Aragon and Sicily Alfonso of Aragon Alfonso 's brother John II of Aragon .
Eventually , Alfonso of Aragon divided the two kingdoms during his rule .